1
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Liu G, Yang X, Gu P, Wang M, Zhang X, Dong XQ. Challenging Task of Ni-Catalyzed Highly Regio-/Enantioselective Semihydrogenation of Racemic Tetrasubstituted Allenes via a Kinetic Resolution Process. J Am Chem Soc 2024; 146:7419-7430. [PMID: 38447583 DOI: 10.1021/jacs.3c12597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
The first earth-abundant transition metal Ni-catalyzed highly regio- and enantioselective semihydrogenation of racemic tetrasubstituted allenes via a kinetic resolution process as a challenging task was well established. This protocol furnishes expedient access to a diversity of structurally important enantioenriched tetrasubstituted allenes and chiral allylic molecules with high regio-, enantio-, and Z/E-selectivity. Remarkably, this semihydrogenation proceeded with one carbon-carbon double bond of allenes, which was regioselective complementary to the Rh-catalyzed asymmetric version. Deuterium labeling experiments and density functional theory (DFT) calculations were carried out to reveal the reasonable reaction mechanism and explain the regio-/stereoselectivity.
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Affiliation(s)
- Gang Liu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Xuanliang Yang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
| | - Pei Gu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, P. R. China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, P. R. China
| | - Xumu Zhang
- Department of Chemistry, Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518000, Guangdong, P. R. China
| | - Xiu-Qin Dong
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
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2
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Wang J, Luo MP, Gu YJ, Liu YY, Yin Q, Wang SG. Chiral Cp x Rhodium(III)-Catalyzed Enantioselective Aziridination of Unactivated Terminal Alkenes. Angew Chem Int Ed Engl 2024; 63:e202400502. [PMID: 38279683 DOI: 10.1002/anie.202400502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/26/2024] [Accepted: 01/26/2024] [Indexed: 01/28/2024]
Abstract
Chiral cyclopentadienyl-rhodium(III) Cpx Rh(III) catalysis has been demonstrated to be competent for catalyzing highly enantioselective aziridination of challenging unactivated terminal alkenes and nitrene sources. The chiral Cpx Rh(III) catalysis system exhibited outstanding catalytic performance and wide functional group tolerance, yielding synthetically important and highly valuable chiral aziridines with good to excellent yields and enantioselectivities (up to 99 % yield, 93 % ee). This protocol presents a novel and effective strategy for synthesizing enantioenriched aziridines from simple alkenes. Various transformations were performed on the aziridine products, illustrating the versatility and synthetic potential of this protocol for constructing highly functionalized compounds.
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Affiliation(s)
- Juanjuan Wang
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Mu-Peng Luo
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yi-Jie Gu
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yu-Ying Liu
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qin Yin
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Shou-Guo Wang
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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3
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Xu CH, Xiong ZQ, Qin JH, Xu XH, Li JH. Nickel-Catalyzed Reductive Cross-Coupling of Propargylic Acetates with Chloro(vinyl)silanes: Access to Silylallenes. J Org Chem 2024; 89:2885-2894. [PMID: 38355424 DOI: 10.1021/acs.joc.3c02228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Because of their various reactivities, propargyl acetates are refined chemical intermediates that are extensively applied in pharmaceutical synthesis. Currently, reactions between propargyl acetates and chlorosilanes may be the most effective method for synthesizing silylallenes. Nevertheless, owing to the adaptability and selectivity of substrates, transition metal catalysis is difficult to achieve. Herein, nickel-catalyzed reductive cross-coupling reactions between propargyl acetates and substituted vinyl chlorosilanes for the synthesis of tetrasubstituted silylallenes are described. Therein, metallic zinc is a crucial reductant that effectively enables two electrophilic reagents to selectively construct C(sp2)-Si bonds. Additionally, a Ni-catalyzed reductive mechanism involving a radical process is proposed on the basis of deuteration-labeled experiments.
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Affiliation(s)
- Chong-Hui Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Zhi-Qiang Xiong
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jing-Hao Qin
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Xin-Hua Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 475004, Henan, China
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4
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Nicastri KA, Gerstner NC, Schomaker JM. Progress toward the Total Synthesis of Jogyamycin Using a Tandem Ichikawa/Winstein Rearrangement. Org Lett 2023; 25:8279-8283. [PMID: 37997640 PMCID: PMC10789149 DOI: 10.1021/acs.orglett.3c03286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Jogyamycin is a densely functionalized aminocyclopentitol that displays potent antiprotozoal activity. Herein, we report a route toward this natural product that utilizes an unprecedented transformation involving a tandem Ichikawa-Winstein rearrangement to install the C-1/C-2 diamine core. Attempts to further functionalize the C-3/C-4 alkene en route to jogyamycin are also discussed.
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Affiliation(s)
- Kate A Nicastri
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Nels C Gerstner
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
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5
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Zhang Y, Yang J, Ruan YL, Liao L, Ma C, Xue XS, Yu JS. Nickel-catalysed asymmetric hydromonofluoromethylation of 1,3-enynes for enantioselective construction of monofluoromethyl-tethered chiral allenes. Chem Sci 2023; 14:12676-12683. [PMID: 38020394 PMCID: PMC10646904 DOI: 10.1039/d3sc04474b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 10/22/2023] [Indexed: 12/01/2023] Open
Abstract
An unprecedented nickel-catalysed enantioselective hydromonofluoromethylation of 1,3-enynes is developed, allowing the diverse access to monofluoromethyl-tethered axially chiral allenes, including the challenging deuterated monofluoromethyl (CD2F)-tethered ones that are otherwise inaccessible. It represents the first asymmetric 1,4-hydrofunctionalization of 1,3-enynes using low-cost asymmetric nickel catalysis, thus opening a new avenue for the activation of 1,3-enynes in reaction development. The utility is further verified by its broad substrate scope, good functionality tolerance, mild conditions, and diversified product elaborations toward other valuable fluorinated structures. Mechanistic experiments and DFT calculations provide insights into the reaction mechanism and the origin of the enantioselectivity.
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Affiliation(s)
- Ying Zhang
- State Key Laboratory of Molecular & Process Engineering, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
| | - Jimin Yang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Shanghai 200032 China
| | - Yu-Long Ruan
- State Key Laboratory of Molecular & Process Engineering, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
| | - Ling Liao
- State Key Laboratory of Molecular & Process Engineering, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
| | - Chuang Ma
- State Key Laboratory of Molecular & Process Engineering, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
| | - Xiao-Song Xue
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Shanghai 200032 China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences Hangzhou 310024 China
| | - Jin-Sheng Yu
- State Key Laboratory of Molecular & Process Engineering, Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
- Hubei Key Laboratory of Quality Control of Characteristic Fruits and Vegetables, Hubei Engineering University Xiaogan 432000 China
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6
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Xu CH, Xiong ZQ, Qin JH, Xu XH, Li JH. Cobalt-Promoted Electroreductive Cross-Coupling of Prop-2-yn-1-yl Acetates with Chloro(vinyl)silanes. Org Lett 2023; 25:7263-7267. [PMID: 37756013 DOI: 10.1021/acs.orglett.3c02989] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
An electroreductive cross-coupling of prop-2-yn-1-yl acetates with chloro(vinyl)silanes for producing tetrasubstituted silylallenes is developed. The method enables the formation of a new C─Si bond through the cathodic reduction formation of the silyl radical, radical addition across the C≡C bond, the alkenyl anion intermediate formation, and deacetoxylation and represents a mild, practical route to the synthesis of silylallenes. Mechanistic studies reveal that CoCl2 acts as the mediator to promote the formation of the alkenyl anion intermediate via electron transfer.
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Affiliation(s)
- Chong-Hui Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Zhi-Qiang Xiong
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jing-Hao Qin
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Xin-Hua Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Jin-Heng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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7
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Pan B, Sun HT, Zhang SS, Wang S, Yang YQ, Xu GZ, Su XB. Solvent-Controlled Regioselective Reaction of 2-Methyleneaziridines with Acrylic/Propargylic Acids: Synthesis of Carboxylate Aziridine/Acetone Esters. Org Lett 2022; 24:7492-7496. [PMID: 36215416 DOI: 10.1021/acs.orglett.2c02589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report a convenient solvent-controlled regioselective esterification to access two types of carboxylate esters without any additive or non-green activation strategy. In this transformation, 2-methyleneaziridines served as an ester reagent, providing two alternative electrophilic carbon centers. Notably, this protocol is suitable for some structure-complicated clinical molecules with a carboxylic acid group, presenting remarkable application potential.
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Affiliation(s)
- Bin Pan
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Hao-Tian Sun
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Shan-Shan Zhang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Shang Wang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Yong-Qi Yang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Guang-Zhao Xu
- School of Pharmacy, Weifang Medical University, Weifang 261053, P. R. China
| | - Xian-Bin Su
- College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
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8
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Shirazian TS, Zahedian Tejeneki H, Nikbakht A, Rominger F, Balalaie S. Sequential Base‐Promoted Formal [4+2] Allenoate Based Cycloaddition: An Efficient Strategy for the Synthesis of Functionalized Acridines. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Toktam S. Shirazian
- KN Toosi University of Technology Department of Chemistry Tehran IRAN (ISLAMIC REPUBLIC OF)
| | | | - Ali Nikbakht
- KN Toosi University of Technology Department of Chemistry Tehran IRAN (ISLAMIC REPUBLIC OF)
| | - Frank Rominger
- Heidelberg University Organisch-Chemisches Institut Heidelberg GERMANY
| | - Saeed Balalaie
- K N Toosi University of Technology Faculty of General Science Chemistry Department PO Box 15875-4416 15875-4416 Tehran IRAN (ISLAMIC REPUBLIC OF)
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9
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Gao GQ, Ma G, Jiang XL, Liu Q, Fan CL, Lv DC, Su H, Ru GX, Shen WB. Gold-catalyzed cycloadditions of allenes via metal carbenes. Org Biomol Chem 2022; 20:5035-5044. [PMID: 35661854 DOI: 10.1039/d2ob00626j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In recent years, gold-catalyzed cycloadditions of allenes, especially those involving a gold carbene intermediate, have received significant interest, as they avoid the utilization of potentially hazardous and inaccessible diazo compounds as starting materials for carbene generation. Cycloaddition reactions consisting of the uncomplicated addition of two or more unsaturated functional groups are one of the most efficient synthetic methodologies for the rapid assembly of carbo- and heterocyclic structures from simple acyclic precursors. In this review, we introduce an overview of the advances in the gold-catalyzed cycloaddition of allenes via a metal carbene intermediate and categorize these reactions according to the reaction types of the cycloadditions.
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Affiliation(s)
- Guang-Qin Gao
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Guang Ma
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Xiao-Lei Jiang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China. .,Sanmenxia Polytechnic, Sanmenxia, Henan 472000, China
| | - Qing Liu
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Cai-Ling Fan
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Dong-Can Lv
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Hui Su
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Guang-Xin Ru
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Wen-Bo Shen
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
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10
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Recent Advances in Catalytic Alkyne Transformation via Copper Carbene Intermediates. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103088. [PMID: 35630567 PMCID: PMC9144650 DOI: 10.3390/molecules27103088] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 04/29/2022] [Accepted: 05/06/2022] [Indexed: 02/01/2023]
Abstract
As one of the abundant and inexpensive metals on the earth, copper has demonstrated broad applications in synthetic chemistry and catalysis. Among these copper-catalyzed advances, copper carbenes are versatile and reactive intermediates that can mediate a variety of transformations, which have attracted much attention in the past decades. The present review summarizes two different reaction models that take place between a copper carbene intermediate and alkyne species, including the cross-coupling reaction of copper carbene intermediate with terminal alkyne, and the addition of copper carbene intermediate onto the C–C triple bond. This article will cover the profile from 2010 to 2021 by placing emphasis on the detailed catalytic models and highlighting the synthetic applications offered by these practical and mild methods.
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11
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Tang X, Zhang Y, Tang Y, Li Y, Zhou J, Wang D, Gao L, Su Z, Song Z. Ring Expansion of Silacyclobutanes with Allenoates to Selectively Construct 2- or 3-( E)-Enoate-Substituted Silacyclohexenes. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xiaoxiao Tang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yan Zhang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yulang Tang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yi Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Jiajing Zhou
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Duyang Wang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Lu Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Zhishan Su
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Zhenlei Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
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12
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Xiao W, Wu J. Recent advances in the metal-catalyzed asymmetric synthesis of chiral allenes. Org Chem Front 2022. [DOI: 10.1039/d2qo00994c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Recent advances in the metal-catalyzed asymmetric synthesis of chiral allenes are summarized. This review is categorized based on the starting material, including alkynes, racemic allenes, and conjugated dienes.
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Affiliation(s)
- Wei Xiao
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Jie Wu
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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13
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Li C, Hu DD, Jin RX, Wu BB, Wang CY, Ke Z, Wang XS. Selective 1,4-arylsulfonation of 1,3-enynes via photoredox/nickel dual catalysis. Org Chem Front 2022. [DOI: 10.1039/d1qo01653a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A photoredox/nickel-catalyzed selective 1,4-arylsulfonation of 1,3-enynes to access structurally diverse sulfone-containing allenes has been established with low catalyst loading.
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Affiliation(s)
- Chao Li
- School of Materials Science & Engineering, School of Chemistry, PCFM Lab, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Duo-Duo Hu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ruo-Xing Jin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Bing-Bing Wu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Cheng-Yu Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Zhuofeng Ke
- School of Materials Science & Engineering, School of Chemistry, PCFM Lab, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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14
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Wu Y, Yue Z, Qian C, Chen X, Li F, Li P, Li W. Organocatalytic Enantioselective Construction of Axially Chiral Tetrasubstituted Allenes via 1,6‐Addition of Alkynyl Indole Imine Methides with 2‐Substituted Indoles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yu Wu
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University Qingdao Shandong 266021 P. R. China
| | - Zhibin Yue
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University Qingdao Shandong 266021 P. R. China
| | - Chenxiao Qian
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis College of Science Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Xuling Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis College of Science Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Fushuai Li
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University Qingdao Shandong 266021 P. R. China
| | - Pengfei Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis College of Science Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Wenjun Li
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University Qingdao Shandong 266021 P. R. China
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15
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Xiao J, Cui Y, Li C, Xu H, Zhai Y, Zhang X, Ma S. Room Temperature Allenation of Terminal Alkynes with Aldehydes. Angew Chem Int Ed Engl 2021; 60:25708-25713. [PMID: 34595806 DOI: 10.1002/anie.202109879] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/17/2021] [Indexed: 11/10/2022]
Abstract
A gold-catalyzed room temperature allenation of terminal alkynes (ATA) with aldehydes affording 1,3-disubstituted allenes with diverse functional groups has been developed by identifying a gold(I) catalyst and an amine. The practicality of this reaction has been demonstrated by a ten gram-scale synthesis and the synthetic potentials have been demonstrated via various transformations and formal total synthesis of (-)-centrolobine. Mechanistic studies revealed that the gold catalyst, the aldehyde effect, the fluoroalkyl hydroxyl solvent (TFE or HFIP) and the structure of amine are vital in this room temperature ATA reaction.
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Affiliation(s)
- Junzhe Xiao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yifan Cui
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Can Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Haibo Xu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yizhan Zhai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xue Zhang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,Research Centre for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
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16
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Xiao J, Cui Y, Li C, Xu H, Zhai Y, Zhang X, Ma S. Room Temperature Allenation of Terminal Alkynes with Aldehydes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Junzhe Xiao
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yifan Cui
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Can Li
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Haibo Xu
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yizhan Zhai
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Xue Zhang
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
- Research Centre for Molecular Recognition and Synthesis Department of Chemistry Fudan University 220 Handan Lu Shanghai 200433 P. R. China
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17
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Georg I, Bursch M, Endeward B, Bolte M, Lerner HW, Grimme S, Wagner M. The power of trichlorosilylation: isolable trisilylated allyl anions, allyl radicals, and allenyl anions. Chem Sci 2021; 12:12419-12428. [PMID: 34603672 PMCID: PMC8480423 DOI: 10.1039/d1sc03958j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 08/13/2021] [Indexed: 11/21/2022] Open
Abstract
Treatment of hexachloropropene (Cl2C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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C(Cl)–CCl3) with Si2Cl6 and [nBu4N]Cl (1 : 4 : 1) in CH2Cl2 results in a quantitative conversion to the trisilylated, dichlorinated allyl anion salt [nBu4N][Cl2CC(SiCl3)–C(SiCl3)2] ([nBu4N][1]). Tetrachloroallene Cl2CCCCl2 was identified as the first intermediate of the reaction cascade. In the solid state, [1]− adopts approximate Cs symmetry with a dihedral angle between the planes running through the olefinic and carbanionic fragments of [1]− of CC–Si//Si–C–Si = 78.3(1)°. One-electron oxidation of [nBu4N][1] with SbCl5 furnishes the distillable blue radical 1˙. The neutral propene Cl2CC(SiCl3)–C(SiCl3)2H (2) was obtained by (i) protonation of [1]− with HOSO2CF3 (HOTf) or (ii) H-atom transfer to 1˙ from 1,4-cyclohexadiene. Quantitative transformation of all three SiCl3 substituents in 2 to Si(OMe)3 (2OMe) or SiMe3 (2Me) substituents was achieved by using MeOH/NMe2Et or MeMgBr in CH2Cl2 or THF, respectively. Upon addition of 2 equiv. of tBuLi, 2Me underwent deprotonation with subsequent LiCl elimination, 1,2-SiMe3 migration and Cl/Li exchange to afford the allenyl lithium compound Me3Si(Li)CCC(SiMe3)2 (Li[4]), which is an efficient building block for the introduction of Me, SiMe3, or SnMe3 (5) groups. The trisilylated, monochlorinated allene Cl3Si(Cl)CCC(SiCl3)2 (6), was obtained from [nBu4N][1] through Cl−-ion abstraction with AlCl3 and rearrangement in CH2Cl2 (1˙ forms as a minor side product, likely because the system AlCl3/CH2Cl2 can also act as a one-electron oxidant). Treatment of hexachloropropene (Cl2CC(Cl)–CCl3) with Si2Cl6 and [nBu4N]Cl (1 : 4 : 1) in CH2Cl2 results in a quantitative conversion to the trisilylated, dichlorinated allyl anion salt [nBu4N][Cl2CC(SiCl3)–C(SiCl3)2] ([nBu4N][1]).![]()
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Affiliation(s)
- Isabelle Georg
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt Max-von-Laue-Straße 7 D-60438 Frankfurt (Main) Germany
| | - Markus Bursch
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Universität Bonn Beringstraße 4 53115 Bonn Germany
| | - Burkhard Endeward
- Institut für Physikalische und Theoretische Chemie, Goethe-Universität Frankfurt Max-von-Laue-Str. 7 D-60438 Frankfurt (Main) Germany
| | - Michael Bolte
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt Max-von-Laue-Straße 7 D-60438 Frankfurt (Main) Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt Max-von-Laue-Straße 7 D-60438 Frankfurt (Main) Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Universität Bonn Beringstraße 4 53115 Bonn Germany
| | - Matthias Wagner
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt Max-von-Laue-Straße 7 D-60438 Frankfurt (Main) Germany
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18
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Weyer N, Heinz M, Bruhn C, Holthausen MC, Siemeling U. Reactivity of an N-heterocyclic silylene with a 1,1'-ferrocenediyl backbone towards carbonyl compounds, including carbon suboxide. Chem Commun (Camb) 2021; 57:9378-9381. [PMID: 34528963 DOI: 10.1039/d1cc03947d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Reactions of a silylene with a ketene and with carbon suboxide are reported, respectively leading to the first silaallene oxide and to a silylketene, whose reaction with water affords the first structurally characterised stable methyleneketene and constitutes a unique type of single-crystal-to-single-crystal transformation of a molecular solid by a stoichiometric gas-solid chemical reaction.
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Affiliation(s)
- Nadine Weyer
- Institut für Chemie, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
| | - Myron Heinz
- Institut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438 Frankfurt am Main, Germany
| | - Clemens Bruhn
- Institut für Chemie, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
| | - Max C Holthausen
- Institut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438 Frankfurt am Main, Germany
| | - Ulrich Siemeling
- Institut für Chemie, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
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19
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Zorba L, Egaña E, Gómez-Bengoa E, Vougioukalakis GC. Zinc Iodide Catalyzed Synthesis of Trisubstituted Allenes from Terminal Alkynes and Ketones. ACS OMEGA 2021; 6:23329-23346. [PMID: 34549133 PMCID: PMC8444324 DOI: 10.1021/acsomega.1c03092] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 07/13/2021] [Indexed: 05/03/2023]
Abstract
A straightforward, user-friendly, efficient protocol for the one pot, ZnI2-catalyzed allenylation of terminal alkynes with pyrrolidine and ketones, toward trisubstituted allenes, is described. Trisubstituted allenes can be obtained under either conventional heating or microwave irradiation conditions, which significantly reduces the reaction time. A sustainable, widely available, and low-cost metal salt catalyst is employed, and the reactions are carried out under solvent-free conditions. Among others, synthetically valuable allenes bearing functionalities such as amide, hydroxyl, or phthalimide can be efficiently prepared. Mechanistic experiments, including kinetic isotope effect measurements and density functional theory (DFT) calculations, suggest a rate-determining [1,5]-hydride transfer during the transformation of the intermediate propargylamine to the final allene.
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Affiliation(s)
- Leandros
P. Zorba
- Laboratory
of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15771 Athens, Greece
| | - Eunate Egaña
- Department
of Organic Chemistry I, Faculty of Chemistry, University of the Basque Country UPV/EHU, 20018 Donostia-San Sebastián, Spain
| | - Enrique Gómez-Bengoa
- Department
of Organic Chemistry I, Faculty of Chemistry, University of the Basque Country UPV/EHU, 20018 Donostia-San Sebastián, Spain
| | - Georgios C. Vougioukalakis
- Laboratory
of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15771 Athens, Greece
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20
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O'Connor TJ, Mai BK, Nafie J, Liu P, Toste FD. Generation of Axially Chiral Fluoroallenes through a Copper-Catalyzed Enantioselective β-Fluoride Elimination. J Am Chem Soc 2021; 143:13759-13768. [PMID: 34465099 DOI: 10.1021/jacs.1c05769] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Herein we report the copper-catalyzed silylation of propargylic difluorides to generate axially chiral, tetrasubstituted monofluoroallenes in both good yields (27 examples >80%) and enantioselectivities (82-98% ee). Compared to previously reported synthetic routes to axially chiral allenes (ACAs) from prochiral substrates, a mechanistically distinct reaction has been developed: the enantiodiscrimination between enantiotopic fluorides to set an axial stereocenter. DFT calculations and vibrational circular dichroism (VCD) suggest that β-fluoride elimination from an alkenyl copper intermediate likely proceeds through a syn-β-fluoride elimination pathway rather than an anti-elimination pathway. The effects of the C1-symmetric Josiphos-derived ligand on reactivity and enantioselectivity were investigated. Not only does this report showcase that alkenyl copper species (like their alkyl counterparts) can undergo β-fluoride elimination, but this elimination can be achieved in an enantioselective fashion.
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Affiliation(s)
- Thomas J O'Connor
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jordan Nafie
- BioTools, Inc., 17546 Bee Line Highway, Jupiter, Florida 33458, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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21
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Huang C, Shi F, Cui Y, Li C, Lin J, Liu Q, Qin A, Wang H, Wu G, Wu P, Xiao J, Xu H, Yuan Y, Zhai Y, Zheng WF, Zheng Y, Yu B, Ma S. A palladium-catalyzed approach to allenic aromatic ethers and first total synthesis of terricollene A. Chem Sci 2021; 12:9347-9351. [PMID: 34349905 PMCID: PMC8278932 DOI: 10.1039/d1sc01896e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/04/2021] [Indexed: 11/30/2022] Open
Abstract
A palladium-catalyzed C-O bond formation reaction between phenols and allenylic carbonates to give 2,3-allenic aromatic ethers with decent to excellent yields under mild reaction conditions has been described. A variety of synthetically useful functional groups are tolerated and the synthetic utility of this method has been demonstrated through a series of transformations of the allene moiety. By applying this reaction as the key step, the total syntheses of naturally occurring allenic aromatic ethers, eucalyptene and terricollene A (first synthesis; 4.5 g gram scale), have been accomplished.
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Affiliation(s)
- Chaofan Huang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Fuchun Shi
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Yifan Cui
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Can Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Jie Lin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Qi Liu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Anni Qin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Huanan Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Guolin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Penglin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Junzhe Xiao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Haibo Xu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Yuan Yuan
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Yizhan Zhai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Wei-Feng Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Yangguangyan Zheng
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Biao Yu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P. R. China
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22
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Cortes Vazquez J, Davis J, Nesterov VN, Wang H, Luo W. Sc(OTf) 3-Catalyzed Formal [3 + 3] Cycloaddition Reaction of Diaziridines and Quinones for the Synthesis of Benzo[ e][1,3,4]oxadiazines. Org Lett 2021; 23:3136-3140. [PMID: 33819425 DOI: 10.1021/acs.orglett.1c00818] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A formal [3 + 3] cyclization reaction of diaziridines and quinones has been developed offering 1,3,4-oxadiazinanes in generally high yields (up to 96%). The reaction was catalyzed by Sc(OTf)3 with a large substrate scope for both diaziridines and quinones. The synergistic activation of 1,3-dipolar diaziridines and the dipolar quinones was found to be essential to enable this reaction.
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Affiliation(s)
- Jose Cortes Vazquez
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Jacqkis Davis
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Vladimir N Nesterov
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Hong Wang
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Weiwei Luo
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
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23
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Ghorai S, Lee D. Selectivity for Alkynyl or Allenyl Imidamides and Imidates in Copper-Catalyzed Reactions of Terminal 1,3-Diynes and Azides. Org Lett 2021; 23:697-701. [PMID: 33443441 DOI: 10.1021/acs.orglett.0c03861] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Copper-catalyzed reactions of terminal 1,3-diynes with electron-deficient azides to generate either 3-alkynyl or 2,3-dienyl imidamides and imidates are described. The selectivity depends on the diyne substituents and the nucleophile that reacts with the ketenimide intermediate generated from the corresponding triazole precursor. Reactions of 1,3-diynes containing a propargylic acetate afford [3]cumulenyl imidamides, while reactions using methanol as the trapping agent selectively generate 2,3-dienyl imidates. Five-membered heterocycles were obtained from 1,3-diynes containing a homopropargylic hydroxyl or amine substituent.
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Affiliation(s)
- Sourav Ghorai
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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24
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Wang W, Bao X, Wei S, Nawaz S, Qu J, Wang B. Asymmetric sequential annulation/aldol process of 4-isothiocyanato pyrazolones and allenones: access to novel spiro[pyrrole-pyrazolones] and spiro[thiopyranopyrrole-pyrazolones]. Chem Commun (Camb) 2021; 57:363-366. [PMID: 33319884 DOI: 10.1039/d0cc07113g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalytic asymmetric sequential annulation/aldol reaction of 4-isothiocyanato pyrazolones and allenyl ketones has been developed, which furnished a series of spiro[pyrrole-pyrazolone] heterocycles and structurally novel spiro[thiopyranopyrrole-pyrazolone] derivatives in good yields with high to excellent enantioselectivities. Notably, parallel resolution of racemic spiro[pyrrole-pyrazolones] was achieved by a catalyst-controlled asymmetric intramolecular vinylogous aldol process. Structure diversity of the product was further enhanced by ready transformations.
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Affiliation(s)
- Wenyao Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China.
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25
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Pan B, Li F, Zhao Y. Synthesis and applications of methyleneaziridines. RSC Adv 2020; 10:39304-39322. [PMID: 35518396 PMCID: PMC9057395 DOI: 10.1039/d0ra07663e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 10/19/2020] [Indexed: 11/21/2022] Open
Abstract
Methyleneaziridines (MAs) are a special subset of aziridines featuring an exocyclic C–C double bond on the three-membered ring. They have found great potential in organic synthesis. In this review, the structural characterization of MAs, synthetic methods, chemical transformations and mechanisms, especially the advances achieved over the past decade are comprehensively summarized. This review surveys the structural characterization, synthetic methods, chemical transformations and mechanisms of methyleneaziridines, especially the advances achieved over the past decade.![]()
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Affiliation(s)
- Bin Pan
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology Shouguang China
| | - Feng Li
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology Shouguang China
| | - Yingying Zhao
- School of Chemistry and Chemical Engineering, Liaoning Normal University 850 Huanghe Road Dalian 116029 China
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26
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Pradhan TR, Lee HE, Gonzalez‐Montiel GA, Cheong PH, Park JK. Highly Chemoselective Esterification from
O
‐Aminoallylation of Carboxylic Acids: Metal‐ and Reagent‐Free Hydrocarboxylation of Allenamides. Chemistry 2020; 26:13826-13831. [DOI: 10.1002/chem.202000778] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Indexed: 02/01/2023]
Affiliation(s)
- Tapas R. Pradhan
- Department of Chemistry and Institution for Functional Materials Pusan National University Busan 46241 Korea
| | - Hae Eun Lee
- Department of Chemistry and Institution for Functional Materials Pusan National University Busan 46241 Korea
| | | | | | - Jin Kyoon Park
- Department of Chemistry and Institution for Functional Materials Pusan National University Busan 46241 Korea
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27
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Abstract
The defining feature of the Nazarov cyclization is a 4π-conrotatory electrocyclization, resulting in the stereospecific formation of functionalized cyclopentanones. The reaction provides access to structural motifs that are found in many natural products and drug targets. Harnessing the full potential of the Nazarov cyclization broadens its utility by enabling the development of new methodologies and synthetic strategies. To achieve these goals through efficient cyclization design, it is helpful to think of the reaction as a two-stage process. The first stage involves a 4π-electrocyclization leading to the formation of an allylic cation, and the second stage corresponds to the fate of this cationic intermediate. With a complete understanding of the discrete events that characterize the overall process, one can optimize reactivity and control the selectivity of the different Stage 2 pathways.In this Account, we describe the development of methods that render the Nazarov cyclization catalytic and chemoselective, focusing specifically on advances made in our lab between 2002 and 2015. The initial discovery made in our lab involved reactions of electronically asymmetric ("polarized") substrates, which cyclize efficiently in the catalytic regime using mild Lewis acidic reagents. These cyclizations also exhibit selective eliminative behavior, increasing their synthetic utility. Research directed toward catalytic asymmetric Nazarov cyclization led to the serendipitous discovery of a 4π-cyclization coupled to a well-behaved Wagner-Meerwein rearrangement, representing an underexplored Stage 2 process. With careful choice of promoter and loading, it is possible to access either the rearrangement or the elimination pathway. Additional experimental and computational studies provided an effective model for anticipating the migratory behavior of substiutents in the rearrangements. Problem-solving efforts prompted investigation of alternative methods for generating pentadienyl cation intermediates, including oxidation of allenol ethers and addition of nucleophiles to dienyl diketones. These Nazarov cyclization variants afford cyclopentenone products with vicinal stereogenic centers and a different arrangement of substituents around the ring. A nucleophilic addition/cyclization/elimination sequence can be executed enantioselectively using catalytic amounts of a nonracemic chiral tertiary amine.In summary, the discovery and development of several new variations on the Nazarov electrocyclization are described, along with synthetic applications. This work illustrates how strongly substitution patterns can impact the efficiency of the 4π-electrocyclization (Stage 1), allowing for mild Lewis acid catalysis. Over the course of these studies, we have also identified new ways to access the critical pentadienyl cation intermediates and demonstrated strategies that exploit and control the different cationic pathways available post-electrocyclization (Stage 2 processes). These advances in Nazarov chemistry were subsequently employed in the synthesis of natural product targets such as (±)-merrilactone A, (±)-rocaglamide, and (±)-enokipodin B.
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Affiliation(s)
- Alison J. Frontier
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Jackson J. Hernandez
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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28
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Hoveyda AH, Zhou Y, Shi Y, Brown MK, Wu H, Torker S. Sulfonate N‐Heterocyclic Carbene–Copper Complexes: Uniquely Effective Catalysts for Enantioselective Synthesis of C−C, C−B, C−H, and C−Si Bonds. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003755] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Amir H. Hoveyda
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
| | - Yuebiao Zhou
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Ying Shi
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - M. Kevin Brown
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Hao Wu
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Sebastian Torker
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
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29
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Hoveyda AH, Zhou Y, Shi Y, Brown MK, Wu H, Torker S. Sulfonate N-Heterocyclic Carbene-Copper Complexes: Uniquely Effective Catalysts for Enantioselective Synthesis of C-C, C-B, C-H, and C-Si Bonds. Angew Chem Int Ed Engl 2020; 59:21304-21359. [PMID: 32364640 DOI: 10.1002/anie.202003755] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Indexed: 12/21/2022]
Abstract
A copper-based complex that contains a sulfonate N-heterocyclic carbene ligand was first reported 15 years ago. Since then, these organometallic entities have proven to be uniquely effective in catalyzing an assortment of enantioselective transformations, including allylic substitutions, conjugate additions, proto-boryl additions to alkenes, boryl and silyl substitutions, hydride-allyl additions to alkenyl boronates, and additions of boron-containing allyl moieties to N-H ketimines. In this review article, we detail the shortcomings in the state-of-the-art that fueled the development of this air stable ligand class, members of which can be prepared on multigram scale. For each reaction type, when relevant, the prior art at the time of the advance involving sulfonate NHC-Cu catalysts and/or subsequent key developments are briefly analyzed, and the relevance of the advance to efficient and enantioselective total or formal synthesis of biologically active molecules is underscored. Mechanistic analysis of the structural attributes of sulfonate NHC-Cu catalysts that are responsible for their ability to facilitate transformations with high efficiency as well as regio- and enantioselectivity are detailed. This review contains several formerly undisclosed methodological advances and mechanistic analyses, the latter of which constitute a revision of previously reported proposals.
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Affiliation(s)
- Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA.,Supramolecular Science and Engineering Institute, University of Strasbourg, CNRS, 67000, Strasbourg, France
| | - Yuebiao Zhou
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Ying Shi
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - M Kevin Brown
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Hao Wu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA.,Supramolecular Science and Engineering Institute, University of Strasbourg, CNRS, 67000, Strasbourg, France
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30
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Fortunato M, Gimbert Y, Rousset E, Lameiras P, Martinez A, Gatard S, Plantier-Royon R, Jaroschik F. Diastereoselective Synthesis of Axially Chiral Xylose-Derived 1,3-Disubstituted Alkoxyallenes: Scope, Structure, and Mechanism. J Org Chem 2020; 85:10681-10694. [DOI: 10.1021/acs.joc.0c01240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Moustapha Fortunato
- Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims Champagne-Ardenne, 51687 Reims, France
| | - Yves Gimbert
- Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble Alpes, 38058 Grenoble, France
| | - Elodie Rousset
- Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims Champagne-Ardenne, 51687 Reims, France
| | - Pedro Lameiras
- Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims Champagne-Ardenne, 51687 Reims, France
| | - Agathe Martinez
- Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims Champagne-Ardenne, 51687 Reims, France
| | - Sylvain Gatard
- Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims Champagne-Ardenne, 51687 Reims, France
| | - Richard Plantier-Royon
- Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims Champagne-Ardenne, 51687 Reims, France
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31
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Qi S, Gao S, Xie X, Yang J, Zhang J. Palladium-Catalyzed Fluoroarylation of gem-Difluoroenynes to Access Trisubstituted Trifluoromethyl Allenes. Org Lett 2020; 22:5229-5234. [PMID: 32558574 DOI: 10.1021/acs.orglett.0c01887] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Various new transformations of gem-difluoroalkenes leading to trifluoromethyl substituted compounds have been well established in the past years. However, the development of new transformations of gem-difluoroenynes lags much behind. Herein is reported the fluoroarylation of 1,1-difluoro-1,3-enynes with aryl halides in the presence of silver fluoride affording trisubstituted trifluoromethyl allenes under the catalysis of palladium. The reaction features mild conditions, high functional-group tolerance, and high regioselectivity.
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Affiliation(s)
- Shutao Qi
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Shiquan Gao
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Xiaoxiao Xie
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Junfeng Yang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Junliang Zhang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China.,Stake Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, China.,Zhuhai Fudan Innovation Institute, Zhuhai 519000, China
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32
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Rodríguez MR, Besora M, Molina F, Maseras F, Díaz-Requejo MM, Pérez PJ. Intermolecular Allene Functionalization by Silver-Nitrene Catalysis. J Am Chem Soc 2020; 142:13062-13071. [DOI: 10.1021/jacs.0c04395] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Manuel R. Rodríguez
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Quı́mica Sostenible and Departamento de Quı́mica, Universidad de Huelva, 21007 Huelva, Spain
| | - María Besora
- Departament de Quı́mica Fı́sica i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Francisco Molina
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Quı́mica Sostenible and Departamento de Quı́mica, Universidad de Huelva, 21007 Huelva, Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avenida Països Catalans, 16, 43007 Tarragona, Spain
| | - M. Mar Díaz-Requejo
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Quı́mica Sostenible and Departamento de Quı́mica, Universidad de Huelva, 21007 Huelva, Spain
| | - Pedro J. Pérez
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Quı́mica Sostenible and Departamento de Quı́mica, Universidad de Huelva, 21007 Huelva, Spain
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33
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Li QH, Jiang X, Wu K, Luo RQ, Liang M, Zhang ZH, Huang ZY. Research Progress on the Catalytic Enantioselective Synthesis of Axially Chiral Allenes by Chiral Organocatalysts. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824666200306094427] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Chiral allenes are important structural scaffolds found in many natural products
and drugs, and in addition, they also serve as building blocks for many organic transformations.
The conventional methods for preparing chiral allenes rely on the resolution of
racemic allenes and the chirality transfer between non-racemic propargylic derivatives and
nucleophilic reagents. In recent years, the synthesis of chiral allenes by asymmetric catalysis
has been achieved fruitful results. Among them, enantioselective synthesis of chiral
allenes with chiral organic catalysts is particularly prominent. In this paper, the research
progress of enantioselective synthesis of chiral allenes catalyzed by chiral organic catalysts
in recent years is reviewed, including various reaction systems and synthesis applications.
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Affiliation(s)
- Qing Han Li
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu, China
| | - Xin Jiang
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu, China
| | - Kun Wu
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu, China
| | - Rui Qiang Luo
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu, China
| | - Meng Liang
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu, China
| | - Zhi Hao Zhang
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu, China
| | - Zhe Yao Huang
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu, China
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34
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Reeves RD, Kinkema CN, Landwehr EM, Vine LE, Schomaker JM. Stereodivergent Metal-Catalyzed Allene Cycloisomerizations. Synlett 2020; 11:627-631. [PMID: 34219977 DOI: 10.1055/s-0037-1610746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Metal-catalyzed allene cycloisomerizations provide rapid entry into five-membered carbocyclic frameworks, a common motif in natural products and pharmaceuticals. While both Au(I) and Pd(0)-catalyzed allene cycloisomerizations give 5-endo-dig cyclization, Pd prefers the syn diastereomer in contrast to the anti isomer observed with Au. The change in stereoselectivity is proposed to arise from buildup of A1,3 strain during the key carbopalladation step to furnish the cycloisomerized products in moderate to good dr with yields comparable to Au(I) catalysts.
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Affiliation(s)
- Ryan D Reeves
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI 53706, USA
| | | | - Eleanor M Landwehr
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI 53706, USA
| | - Logan E Vine
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI 53706, USA
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI 53706, USA
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35
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Eshon J, Nicastri KA, Schmid SC, Raskopf WT, Guzei IA, Fernández I, Schomaker JM. Intermolecular [3+3] ring expansion of aziridines to dehydropiperi-dines through the intermediacy of aziridinium ylides. Nat Commun 2020; 11:1273. [PMID: 32152321 PMCID: PMC7062875 DOI: 10.1038/s41467-020-15134-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/21/2020] [Indexed: 01/07/2023] Open
Abstract
The importance of N-heterocycles in drugs has stimulated diverse methods for their efficient syntheses. Methods that introduce significant stereochemical complexity are attractive for identifying new bioactive amine chemical space. Here, we report a [3 + 3] ring expansion of bicyclic aziridines and rhodium-bound vinyl carbenes to form complex dehydropiperidines in a highly stereocontrolled rearrangement. Mechanistic studies and DFT computations indicate that the reaction proceeds through formation of a vinyl aziridinium ylide; this reactive intermediate undergoes a pseudo-[1,4]-sigmatropic rearrangement to directly furnish heterocyclic products with net retention at the new C-C bond. In combination with asymmetric silver-catalyzed aziridination, enantioenriched scaffolds with up to three contiguous stereocenters are rapidly delivered. The mild reaction conditions, functional group tolerance, and high stereospecificity of this method are well-suited for appending piperidine motifs to natural product and complex molecules. Ultimately, our work establishes the value of underutilized aziridinium ylides as key intermediates for converting small, strained rings to larger N-heterocycles.
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Affiliation(s)
- Josephine Eshon
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Kate A Nicastri
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Steven C Schmid
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - William T Raskopf
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avazanda (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA.
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36
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Liu Y, Wang K, Ling B, Chen G, Li Y, Liu L, Bi S. Theoretical elucidation of the multi-functional synthetic methodology for switchable Ni(0)-catalyzed C–H allylations, alkenylations and dienylations with allenes. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00965b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanisms and origins of switchable Ni(0)-catalyzed C–H allylations, alkenylations and dienylations with allenes are theoretically elucidated.
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Affiliation(s)
- Yuxia Liu
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
- Department of Chemical Engineering and Waterloo Institute for Nanotechnology
| | - Kaifeng Wang
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Baoping Ling
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Guang Chen
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Yulin Li
- Key Laboratory of Tibetan Medicine Research & Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources
- Northwest Institute of Plateau Biology
- Chinese Academy of Science
- Xining 810001
- P. R. China
| | - Lingjun Liu
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Siwei Bi
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
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37
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Zhu C, Chu H, Li G, Ma S, Zhang J. Pd-Catalyzed Enantioselective Heck Reaction of Aryl Triflates and Alkynes. J Am Chem Soc 2019; 141:19246-19251. [DOI: 10.1021/jacs.9b10883] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Chenghao Zhu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P.R. China
| | - Haoke Chu
- Department of Chemistry, Fudan University, Shanghai 200438, P.R. China
| | - Gen Li
- Department of Chemistry, Fudan University, Shanghai 200438, P.R. China
| | - Shengming Ma
- Department of Chemistry, Fudan University, Shanghai 200438, P.R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P.R. China
- Department of Chemistry, Fudan University, Shanghai 200438, P.R. China
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38
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Bayeh-Romero L, Buchwald SL. Copper Hydride Catalyzed Enantioselective Synthesis of Axially Chiral 1,3-Disubstituted Allenes. J Am Chem Soc 2019; 141:13788-13794. [PMID: 31423768 PMCID: PMC6748664 DOI: 10.1021/jacs.9b07582] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Indexed: 11/29/2022]
Abstract
The general enantioselective synthesis of axially chiral disubstituted allenes from prochiral starting materials remains a long-standing challenge in organic synthesis. Here, we report an efficient enantio- and chemoselective copper hydride catalyzed semireduction of conjugated enynes to furnish 1,3-disubstituted allenes using water as the proton source. This protocol is sufficiently mild to accommodate an assortment of functional groups including keto, ester, amino, halo, and hydroxyl groups. Additionally, applications of this method for the selective synthesis of monodeuterated allenes and chiral 2,5-dihydropyrroles are described.
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Affiliation(s)
- Liela Bayeh-Romero
- Department of Chemistry, Massachusetts
Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts
Institute of Technology, Cambridge, Massachusetts 02139, United States
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39
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Cai W, Wu J, Zhang H, Jalani HB, Li G, Lu H. Rh-Catalyzed Chemoselective [4 + 1] Cycloaddition Reaction toward Diverse 4-Methyleneprolines. J Org Chem 2019; 84:10877-10891. [DOI: 10.1021/acs.joc.9b01466] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Wangshui Cai
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210023, China
| | - Junxian Wu
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210023, China
| | - Haowei Zhang
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210023, China
| | - Hitesh B. Jalani
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210023, China
- Smart BioPharm, 310-Pilotplant, Incheon Techno-Park, 12-Gaetbeol-ro, Yeonsu-gu, Incheon 21999, South Korea
- College of Pharmacy, Yonsei University, 85-Songdogwahak-ro, Incheon 21983, South Korea
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210023, China
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Hongjian Lu
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210023, China
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40
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Ghosh C, Nagtilak PJ, Kapur M. Rhodium(III)-Catalyzed Directed C-H Dienylation of Anilides with Allenes Leads to Highly Conjugated Systems. Org Lett 2019; 21:3237-3241. [PMID: 30998382 DOI: 10.1021/acs.orglett.9b00958] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Allenes are unique coupling partners in transition-metal-catalyzed C-H functionalization leading to a variety of products via alkenylation, allenylation, allylation, and annulation reactions. The outcome is governed by both the reactivity of the allene and the formation and stability of the organometallic intermediate. An efficient Rh(III)-catalyzed, weakly coordinating group-directed dienylation of electronically unbiased allenes is developed using an N-acyl amino acid as a ligand. Further elaboration of the dienylated products to construct polycyclic compounds is also described.
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Affiliation(s)
- Chiranjit Ghosh
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , Madhya Pradesh , India
| | - Prajyot Jayadev Nagtilak
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , Madhya Pradesh , India
| | - Manmohan Kapur
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , Madhya Pradesh , India
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41
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Ghorai J, Anbarasan P. Developments in Cp*Co
III
‐Catalyzed C−H Bond Functionalizations. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800452] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jayanta Ghorai
- Department of ChemistryIndian Institute of Technology Madras Chennai – 600036
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42
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Song S, Zhou J, Fu C, Ma S. Catalytic enantioselective construction of axial chirality in 1,3-disubstituted allenes. Nat Commun 2019; 10:507. [PMID: 30705274 PMCID: PMC6355870 DOI: 10.1038/s41467-018-07908-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 10/29/2018] [Indexed: 11/17/2022] Open
Abstract
Metal-catalyzed enantioselective construction of the loosening axial allene chirality spreading over three carbon atoms using a chiral ligand is still a significant challenge. In the literature, steric effect of the substrates is the major strategy applied for such a purpose. Herein, we present a general palladium-catalyzed asymmetrization of readily available racemic 2,3-allenylic carbonates with different types of non-substituted and 2-substituted malonates using (R)-(−)-DTBM-SEGPHOS as the preferred ligand to afford 1,3-disubstituted chiral allenes with 90~96% ee. This protocol has been applied to the first enantioselective synthesis of natural product, (R)-traumatic lactone. Control experiments showed that in addition to the chiral ligand, conducting this transformation via Procedure C, which excludes the extensive prior coordination of the allene unit in the starting allene with Pd forming a species without the influence of the chiral ligand, is crucial for the observed high enantioselectivity. Highly enantioselective synthesis of allenes has been relying, so far, on the steric hindrance of substrates. Here the authors achieve excellent stereocontrol in the synthesis of chiral allenes with a palladium-DTBM-SEGPHOS catalytic system in a non-substrate-dependent manner.
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Affiliation(s)
- Shihua Song
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, 310027, Hangzhou, Zhejiang, People's Republic of China
| | - Jing Zhou
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, 310027, Hangzhou, Zhejiang, People's Republic of China
| | - Chunling Fu
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, 310027, Hangzhou, Zhejiang, People's Republic of China
| | - Shengming Ma
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, 310027, Hangzhou, Zhejiang, People's Republic of China.
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43
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Boobalan R, Santhoshkumar R, Cheng CH. Co(III)-Catalyzed [4+1] Annulation of Amides with Allenes via C−H Activation. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801335] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ramadoss Boobalan
- Department of Chemistry; National Tsing Hua University; Hsinchu 30013 Taiwan
| | | | - Chien-Hong Cheng
- Department of Chemistry; National Tsing Hua University; Hsinchu 30013 Taiwan
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44
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Eshon J, Gerstner NC, Schomaker JM. Oxidative allene amination for the synthesis of nitrogen-containing heterocycles. ARKIVOC 2018; 2018:204-233. [PMID: 31903453 PMCID: PMC6941799 DOI: 10.24820/ark.5550190.p010.670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The prevalence of stereochemically complex amines in natural products, pharmaceuticals and other bioactive compounds, coupled with the challenges inherent in their preparation, has inspired our work to develop new and versatile methodologies for the synthesis of amine-containing stereotriads ('triads'). The key step is a highly chemo-, regio-, and stereoselective transition-metal catalyzed nitrene transfer reaction that transforms one of the cumulated double bonds of an allene precursor into a bicyclic methyleneaziridine intermediate. This account summarizes our strategies to rapidly elaborate such intermediates into stereochemically rich, densely functionalized amine triads, nitrogen heterocycles, aminated carbocycles and other useful synthetic building blocks.
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Affiliation(s)
- Josephine Eshon
- Department of Chemistry, 1101 University Avenue, Madison, WI 53706, U.S.A
| | - Nels C Gerstner
- Department of Chemistry, 1101 University Avenue, Madison, WI 53706, U.S.A
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45
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Schmid SC, Guzei IA, Fernández I, Schomaker JM. Ring Expansion of Bicyclic Methyleneaziridines via Concerted, Near-Barrierless [2,3]-Stevens Rearrangements of Aziridinium Ylides. ACS Catal 2018; 8:7907-7914. [PMID: 30294503 PMCID: PMC6173328 DOI: 10.1021/acscatal.8b02206] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of densely functionalized azetidinesin a highly stereocontrolled manner is challenging, but interest in the bioactivities of these small heterocycles has stimulated methods for their preparation. We recently reported a one-carbon ring expansion of bicyclic methylene aziridines under dirhodium catalysis capable of delivering enantioenriched azetidines. This work explores this ring expansion using computational and experimental studies. DFT computations indicate that the reaction proceeds through formation of an aziridinium ylide, which is precisely poised for concerted, asynchronous ring-opening/closing to deliver the azetidines in a [2,3]-Stevens-type rearrangement. The concerted nature of this rearrangement is responsible for the stereospecificity of the reaction, where axial chirality from the initial allene substrate is transferred to the azetidine product with complete fidelity. The computed mechanistic pathway highlights the key roles of the olefin and the rigid structure of the methylene aziridine in differentiating our observed ring expansion from competing cheletropic elimination pathways noted with ylides derived from typical aziridines.
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Affiliation(s)
- Steven C. Schmid
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Ilia A. Guzei
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Israel Fernández
- Departamento de Química Organica I and Centro de Innovacioń en Química Avazanda (ORFEO−CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Jennifer M. Schomaker
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
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46
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Cai W, Wang S, Jalani HB, Wu J, Lu H, Li G. Oxidative Cascade Reaction of N-Aryl-3-alkylideneazetidines and Carboxylic Acids: Access to Fused Pyridines. Org Lett 2018; 20:3833-3837. [PMID: 29920103 DOI: 10.1021/acs.orglett.8b01427] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A versatile silver-promoted oxidative cascade reaction of N-aryl-3-alkylideneazetidines with carboxylic acids is reported, providing a very efficient pathway to functionalized fused pyridines. This method allows introduction of fused pyridine ring systems to heterocycles, drugs, and natural products. A mechanistic study revealed that silver salt is essential for the chemo- and regioselective ring expansion, sequential oxidative nucleophilic additions, and oxidative aromatization. This approach represents the first example of the strained N-heterocycles undergoing a cascade reaction with a π bond and a nucleophile together.
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Affiliation(s)
- Wangshui Cai
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Shuang Wang
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Hitesh B Jalani
- Department of Chemistry and Chemical Biology , Northeastern University , 360 Huntington Avenue , Boston , Massachusetts 02115 , United States
| | - Junxian Wu
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Hongjian Lu
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China.,Department of Chemistry and Biochemistry , Texas Tech University , Lubbock , Texas 79409-1061 , United States
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47
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Santhoshkumar R, Cheng CH. Fickle Reactivity of Allenes in Transition-Metal-Catalyzed C−H Functionalizations. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800133] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
| | - Chien-Hong Cheng
- Department of Chemistry; National Tsing Hua University; Hsinchu 30013 Taiwan
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48
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Lei J, Xu ZG, Tang DY, Li Y, Xu J, Li HY, Zhu J, Chen ZZ. Acid-Promoted One-Pot Synthesis of Substituted Furan and 6-Methylpyrazin-2(1 H)-one Derivatives via Allene Intermediate Formed in Situ. ACS COMBINATORIAL SCIENCE 2018; 20:292-297. [PMID: 29620860 DOI: 10.1021/acscombsci.8b00005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Under the acidic conditions, substituted furans were constructed from γ-alkynyl ketones through corresponding allene intermediates in one-pot. The methodology was also tailored to a series of the Ugi reaction products for the synthesis of 6-methylpyrazin-2(1 H)-one derivatives. The current method offered significant advantages for the combinatorial applications of these chemical scaffolds.
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Affiliation(s)
- Jie Lei
- Key Laboratory for Asymmetric Synthesis and Chiral Technology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing, 402160, China
| | - Zhi-Gang Xu
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing, 402160, China
| | - Dian-Yong Tang
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing, 402160, China
| | - Yong Li
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing, 402160, China
| | - Jia Xu
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing, 402160, China
| | - Hong-yu Li
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
| | - Jin Zhu
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing, 402160, China
| | - Zhong-Zhu Chen
- Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing, 402160, China
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49
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Iwai K, Yokoyama S, Asahara H, Nishiwaki N. A Direct Synthesis of Trisubstituted Allenes from Propargyl Alcohols via Oxaphosphetane Intermediates. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20170372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Kento Iwai
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Soichi Yokoyama
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
- Research Center for Material Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Haruyasu Asahara
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
- Research Center for Material Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
- Department of Applied Chemistry, School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Nagatoshi Nishiwaki
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
- Research Center for Material Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
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50
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Kuppusamy R, Santhoshkumar R, Boobalan R, Wu HR, Cheng CH. Synthesis of 1,2-Dihydroquinolines by Co(III)-Catalyzed [3 + 3] Annulation of Anilides with Benzylallenes. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04087] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ramajayam Kuppusamy
- Department
of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | | | - Ramadoss Boobalan
- Department
of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsin-Ru Wu
- Instrumentation
Center, MOST, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chien-Hong Cheng
- Department
of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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