1
|
Vázquez-Galiñanes N, Sciortino G, Piñeiro-Suárez M, Tóth BL, Maseras F, Fañanás-Mastral M. Switching Selectivity in Borylative Allyl-Allyl Cross-Coupling through Synergistic Catalysis. J Am Chem Soc 2024; 146:21977-21988. [PMID: 39046799 PMCID: PMC11311230 DOI: 10.1021/jacs.4c07188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 07/09/2024] [Accepted: 07/17/2024] [Indexed: 07/27/2024]
Abstract
A Cu/Pd-catalyzed borylative coupling of allenes with allyl carbonates is reported. Synergistic Cu/Pd catalysis enables a divergent selectivity compared to Cu catalysis and allows for the regio-, diastereo-, and enantioselective formation of synthetically versatile chiral borylated 1,5-dienes featuring two adjacent tertiary stereocenters. DFT calculations support a closed inner-sphere SE2' transmetalation between the catalytic allyl copper and allyl palladium intermediates and point at the reductive elimination of the resulting bis(allyl)Pd intermediate as the regio- and diastereo-determining step.
Collapse
Affiliation(s)
- Nuria Vázquez-Galiñanes
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CiQUS), Universidade
de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Giuseppe Sciortino
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), The Barcelona Institute of Science and Technology, Avgda, Països Catalans 16, 43007 Tarragona, Spain
| | - Martín Piñeiro-Suárez
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CiQUS), Universidade
de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Balázs L. Tóth
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CiQUS), Universidade
de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Feliu Maseras
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), The Barcelona Institute of Science and Technology, Avgda, Països Catalans 16, 43007 Tarragona, Spain
| | - Martín Fañanás-Mastral
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CiQUS), Universidade
de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| |
Collapse
|
2
|
Hirano M, Kiyota S. Ru(0)-catalysed synthesis of borylated polyene building blocks by cross-dimerisation toward cross-coupling. Chem Commun (Camb) 2024; 60:7672-7686. [PMID: 38962873 DOI: 10.1039/d4cc02566k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Conjugated and non-conjugated polyenes are important substructures and are often found in biologically active compounds and natural products. Their preparation often needs multiple steps or iterative reactions and as a result, they have poor step economies. In this feature article, we show a new methodology to prepare these substructures by combinations of cross-dimerisation giving borylated polyenes and subsequent cross-coupling reactions. This divergent reaction strategy allows for the opportunity to access many bioactive compounds and natural products as well as some electronic materials.
Collapse
Affiliation(s)
- Masafumi Hirano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
| | - Sayori Kiyota
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
| |
Collapse
|
3
|
Jung Y, Yoo SY, Jin Y, You J, Han S, Yu J, Park Y, Cho SH. Iridium-Catalyzed Chemo-, Diastereo-, and Enantioselective Allyl-Allyl Coupling: Accessing All Four Stereoisomers of (E)-1-Boryl-Substituted 1,5-Dienes by Chirality Pairing. Angew Chem Int Ed Engl 2023; 62:e202218794. [PMID: 36718077 DOI: 10.1002/anie.202218794] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/29/2023] [Accepted: 01/30/2023] [Indexed: 02/01/2023]
Abstract
Here, we report a highly chemo-, diastereo-, and enantioselective allyl-allyl coupling between branched allyl alcohols and α-silyl-substituted allylboronate esters, catalyzed by a chiral iridium complex. The α-silyl-substituted allylboronate esters can be chemoselectively coupled with allyl electrophiles, affording a diverse set of enantioenriched (E)-1-boryl-substituted 1,5-dienes in good yields, with excellent stereoselectivity. By permuting the chiral iridium catalysts and the substrates, we efficiently and selectively obtained all four stereoisomers bearing two consecutive chiral centers. Mechanistic studies via density functional theory calculations revealed the origins of the diastereo- and chemoselectivities, indicating the pivotal roles of the steric interaction, the β-silicon effect, and a rapid desilylation process. Additional synthetic modifications for preparing a variety of enantioenriched compounds containing contiguous chiral centers are also included.
Collapse
Affiliation(s)
- Yongsuk Jung
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Seok Yeol Yoo
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 (Republic of, Korea
| | - Yonghoon Jin
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Jaehyun You
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 (Republic of, Korea
| | - Seungcheol Han
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Jeongwoo Yu
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| | - Yoonsu Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 (Republic of, Korea
| | - Seung Hwan Cho
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673 (Republic of, Korea
| |
Collapse
|
4
|
Lv L, Qian H. Developments and applications of allyl-(aza)allyl coupling reactions. GREEN SYNTHESIS AND CATALYSIS 2023. [DOI: 10.1016/j.gresc.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
|
5
|
Okazaki S, Shimada K, Komine N, Hirano M. Ru(0)-Catalyzed Regioselective Synthesis of Borylated-1,4- and -1,5-Diene Building Blocks. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shione Okazaki
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Keita Shimada
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Nobuyuki Komine
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Masafumi Hirano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| |
Collapse
|
6
|
Li SS, Zhong Q, Zhao J. Copper catalysed protoboration of allenyl-Bdans: efficient synthesis of β-boryl allyl-Bdans. Org Biomol Chem 2022; 20:8605-8609. [DOI: 10.1039/d2ob01694j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A novel strategy for the selective synthesis of β-boryl allyl-Bdan derivatives by employing Cu-catalyzed protoboration of allenyl-Bdan derivatives was developed.
Collapse
Affiliation(s)
- Shi-Sen Li
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Qin Zhong
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jian Zhao
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| |
Collapse
|
7
|
Bayardon J, Rousselin Y, Malacea‐Kabbara R. Synthesis of P‐Chirogenic Diphosphinotriazoles and Their Use in Asymmetric Catalysis. ChemistrySelect 2021. [DOI: 10.1002/slct.202100617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jérôme Bayardon
- Institut de Chimie Moléculaire de l'Université de Bourgogne- Franche-Comté, ICMUB-OCS (UMR-CNRS 6302) 19 avenue A. Savary BP 47870, 21078 Dijon CEDEX France
| | - Yoann Rousselin
- Institut de Chimie Moléculaire de l'Université de Bourgogne- Franche-Comté, ICMUB-OCS (UMR-CNRS 6302) 19 avenue A. Savary BP 47870, 21078 Dijon CEDEX France
| | - Raluca Malacea‐Kabbara
- Institut de Chimie Moléculaire de l'Université de Bourgogne- Franche-Comté, ICMUB-OCS (UMR-CNRS 6302) 19 avenue A. Savary BP 47870, 21078 Dijon CEDEX France
| |
Collapse
|
8
|
Li Z, Zhang L, Nishiura M, Luo G, Luo Y, Hou Z. Enantioselective Cyanoborylation of Allenes by N-Heterocyclic Carbene-Copper Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03018] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Zhenghua Li
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Liang Zhang
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Gen Luo
- Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
9
|
Ji DW, He GC, Zhang WS, Zhao CY, Hu YC, Chen QA. Nickel-catalyzed allyl–allyl coupling reactions between 1,3-dienes and allylboronates. Chem Commun (Camb) 2020; 56:7431-7434. [DOI: 10.1039/d0cc02697b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nickel-hydride catalysis has been developed to facilitate the allyl–allyl cross-coupling reactions between 1,3-dienes and allyl-B(pin) in excellent regioselectivity.
Collapse
Affiliation(s)
- Ding-Wei Ji
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
- University of Chinese Academy of Sciences
| | - Gu-Cheng He
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Wei-Song Zhang
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Chao-Yang Zhao
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Yan-Cheng Hu
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| |
Collapse
|
10
|
Wright TB, Turnbull BWH, Evans PA. Enantioselective Rhodium‐Catalyzed Allylic Alkylation of β,γ‐Unsaturated α‐Amino Nitriles: Synthetic Homoenolate Equivalents. Angew Chem Int Ed Engl 2019; 58:9886-9890. [DOI: 10.1002/anie.201900442] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 03/10/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Timothy B. Wright
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| | - Ben W. H. Turnbull
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| | - P. Andrew Evans
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| |
Collapse
|
11
|
Wright TB, Turnbull BWH, Evans PA. Enantioselective Rhodium‐Catalyzed Allylic Alkylation of β,γ‐Unsaturated α‐Amino Nitriles: Synthetic Homoenolate Equivalents. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Timothy B. Wright
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| | - Ben W. H. Turnbull
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| | - P. Andrew Evans
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| |
Collapse
|
12
|
Liang T, He X, Ji D, Wu H, Xu Y, Li Y, Wang Z, Xu Y, Zhu Q. Transition Metal-Free C5 Tosyloxylation of 8-Aminoquinolines with Phenyliodine Bistrifluoroacetate and Substituted 1,2-Disulfonyl Hydrazides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900092] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Tingting Liang
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 211198 China
- Jiangsu Key Laboratory of Drug Design and Optimization; Department of Medicinal Chemistry; China Pharmaceutical University; Nanjing 211198 China
| | - Xin He
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 211198 China
- Changzhou Vocational Institute of Engineering; Changzhou 213164, China
| | - Dezhong Ji
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 211198 China
- Jiangsu Key Laboratory of Drug Design and Optimization; Department of Medicinal Chemistry; China Pharmaceutical University; Nanjing 211198 China
| | - Huanhuan Wu
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 211198 China
| | - Yizhu Xu
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 211198 China
| | - Yuyan Li
- Jiangsu Key Laboratory of Drug Design and Optimization; Department of Medicinal Chemistry; China Pharmaceutical University; Nanjing 211198 China
| | - Zhibin Wang
- Jiangsu Key Laboratory of Drug Design and Optimization; Department of Medicinal Chemistry; China Pharmaceutical University; Nanjing 211198 China
| | - Yungen Xu
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 211198 China
- Jiangsu Key Laboratory of Drug Design and Optimization; Department of Medicinal Chemistry; China Pharmaceutical University; Nanjing 211198 China
| | - Qihua Zhu
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; Nanjing 211198 China
- Jiangsu Key Laboratory of Drug Design and Optimization; Department of Medicinal Chemistry; China Pharmaceutical University; Nanjing 211198 China
| |
Collapse
|
13
|
Xu G, Fu B, Zhao H, Li Y, Zhang G, Wang Y, Xiong T, Zhang Q. Enantioselective and site-specific copper-catalyzed reductive allyl-allyl cross-coupling of allenes. Chem Sci 2019; 10:1802-1806. [PMID: 30842848 PMCID: PMC6369434 DOI: 10.1039/c8sc04505d] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 12/03/2018] [Indexed: 12/20/2022] Open
Abstract
A copper-catalyzed asymmetric reductive allyl-allyl cross-coupling reaction of allenes with allylic phosphates wherein allenes were used as allylmetal surrogates has been achieved for the first time. This protocol provides an efficient and straightforward route to optically active 1,5-dienes in a highly enantioselective and site-specific fashion. Furthermore, all-carbon quaternary stereogenic centers could also be constructed with this protocol. The versatility of the products is demonstrated through a diverse array of further transformations of the enantioenriched 1,5-dienes.
Collapse
Affiliation(s)
- Guoxing Xu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| | - Bin Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| | - Haiyan Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| | - Yanfei Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| | - Ge Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| | - Ying Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| | - Tao Xiong
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| | - Qian Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis , Department of Chemistry , Northeast Normal University , Changchun , 130024 , Jilin , China .
| |
Collapse
|
14
|
Zheng Y, Yue BB, Wei K, Yang YR. Iridium-Catalyzed Enantioselective Allyl–Allyl Cross-Coupling of Racemic Allylic Alcohols with Allylboronates. Org Lett 2018; 20:8035-8038. [PMID: 30507206 DOI: 10.1021/acs.orglett.8b03627] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yu Zheng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bei-Bei Yue
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Wei
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yu-Rong Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| |
Collapse
|
15
|
Zhou Y, Shi Y, Torker S, Hoveyda AH. SN2″-Selective and Enantioselective Substitution with Unsaturated Organoboron Compounds and Catalyzed by a Sulfonate-Containing NHC-Cu Complex. J Am Chem Soc 2018; 140:16842-16854. [DOI: 10.1021/jacs.8b10885] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yuebiao Zhou
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Ying Shi
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Amir H. Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| |
Collapse
|
16
|
Gao YR, Wang DY, Wang YQ. Asymmetric Syntheses of Amaryllidaceae Alkaloids (-)-Crinane and (+)-4a-Dehydroxycrinamabine. Org Lett 2017; 19:3516-3519. [PMID: 28598164 DOI: 10.1021/acs.orglett.7b01486] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A palladium-catalyzed asymmetric allyl-allyl cross-coupling reaction to construct the chiral quaternary carbon center of crinane alkaloids has been developed. On the basis of an efficient approach, the enantioselective synthesis of (-)-crinane (1) is presented, and the first asymmetric total synthesis of (+)-4a-dehydroxycrinamabine (2) was achieved by subsequent oxidation, 1,4-conjugate addition, RCM reaction, reductive amination, and Pictet-Spengler reaction. The method provided an alternative strategy for the syntheses of crinane alkaloids and other Amaryllidaceae natural products.
Collapse
Affiliation(s)
- Ya-Ru Gao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710069, P. R. China
| | - Da-Yu Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710069, P. R. China
| | - Yong-Qiang Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710069, P. R. China
| |
Collapse
|
17
|
Blair DJ, Tanini D, Bateman JM, Scott HK, Myers EL, Aggarwal VK. Selective uni- and bidirectional homologation of diborylmethane. Chem Sci 2017; 8:2898-2903. [PMID: 28451355 PMCID: PMC5376717 DOI: 10.1039/c6sc05338f] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 01/19/2017] [Indexed: 01/28/2023] Open
Abstract
Diborylmethane can be homologated uni- and bidirectionally by using enantiomerically pure lithium-stabilized carbenoids to give 1,2- and 1,3-bis(boronic esters), respectively, in good yield and with excellent levels of enantio- and diastereoselectivity. The high sensitivity of the transformation to steric hindrance enables the exclusive operation of either manifold, effected through the judicious choice of the type of carbenoid, which can be a sparteine-ligated or a diamine-free lithiated benzoate/carbamate. The scope of the 1,2-bis(boronic esters) so generated is complementary to that encompassed by the asymmetric diboration of alkenes, in that primary-secondary and primary-tertiary 1,2-bis(boronic esters) can be prepared with equally high levels of selectivity and that functional groups, such as terminal alkynes and alkenes, are tolerated. Methods for forming C2-symmetric and non-symmetrical anti and syn 1,3-bis(boronic esters) are also described and represent a powerful route towards 1,3-functionalized synthetic intermediates.
Collapse
Affiliation(s)
- Daniel J Blair
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK .
| | - Damiano Tanini
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK .
| | - Joseph M Bateman
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK .
| | - Helen K Scott
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK .
| | - Eddie L Myers
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK .
| | - Varinder K Aggarwal
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK .
| |
Collapse
|
18
|
Wang X, Wang X, Han Z, Wang Z, Ding K. Palladium-Catalyzed Asymmetric Allylic Allylation of Racemic Morita-Baylis-Hillman Adducts. Angew Chem Int Ed Engl 2016; 56:1116-1119. [DOI: 10.1002/anie.201609332] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/12/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Xubin Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Zhaobin Han
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Zheng Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Kuiling Ding
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| |
Collapse
|
19
|
Wang X, Wang X, Han Z, Wang Z, Ding K. Palladium-Catalyzed Asymmetric Allylic Allylation of Racemic Morita-Baylis-Hillman Adducts. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609332] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Xubin Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Zhaobin Han
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Zheng Wang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Kuiling Ding
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| |
Collapse
|
20
|
Diner C, Szabó KJ. Recent Advances in the Preparation and Application of Allylboron Species in Organic Synthesis. J Am Chem Soc 2016; 139:2-14. [DOI: 10.1021/jacs.6b10017] [Citation(s) in RCA: 189] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Colin Diner
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| |
Collapse
|
21
|
Neeve EC, Geier SJ, Mkhalid IAI, Westcott SA, Marder TB. Diboron(4) Compounds: From Structural Curiosity to Synthetic Workhorse. Chem Rev 2016; 116:9091-161. [PMID: 27434758 DOI: 10.1021/acs.chemrev.6b00193] [Citation(s) in RCA: 737] [Impact Index Per Article: 92.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Although known for over 90 years, only in the past two decades has the chemistry of diboron(4) compounds been extensively explored. Many interesting structural features and reaction patterns have emerged, and more importantly, these compounds now feature prominently in both metal-catalyzed and metal-free methodologies for the formation of B-C bonds and other processes.
Collapse
Affiliation(s)
- Emily C Neeve
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
| | - Stephen J Geier
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | | | - Stephen A Westcott
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | - Todd B Marder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
| |
Collapse
|
22
|
Dutartre M, Bayardon J, Jugé S. Applications and stereoselective syntheses of P-chirogenic phosphorus compounds. Chem Soc Rev 2016; 45:5771-5794. [DOI: 10.1039/c6cs00031b] [Citation(s) in RCA: 233] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review reports the best stereoselective or asymmetric syntheses, the most efficient P*-building blocks and functionalisation of P-chirogenic compounds, in the light of chiral phosphorus compound applications.
Collapse
Affiliation(s)
- Mathieu Dutartre
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB-StéréochIM)
- UMR CNRS 6302
- 21078 Dijon Cedex
- France
| | - Jérôme Bayardon
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB-StéréochIM)
- UMR CNRS 6302
- 21078 Dijon Cedex
- France
| | - Sylvain Jugé
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB-StéréochIM)
- UMR CNRS 6302
- 21078 Dijon Cedex
- France
| |
Collapse
|
23
|
Zhao J, Szabó KJ. Catalytic Borylative Opening of Propargyl Cyclopropane, Epoxide, Aziridine, and Oxetane Substrates: Ligand Controlled Synthesis of Allenyl Boronates and Alkenyl Diboronates. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201510132] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jian Zhao
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry; Stockholm University; Sweden
| |
Collapse
|
24
|
Zhao J, Szabó KJ. Catalytic Borylative Opening of Propargyl Cyclopropane, Epoxide, Aziridine, and Oxetane Substrates: Ligand Controlled Synthesis of Allenyl Boronates and Alkenyl Diboronates. Angew Chem Int Ed Engl 2015; 55:1502-6. [PMID: 26663468 PMCID: PMC4736465 DOI: 10.1002/anie.201510132] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Indexed: 11/21/2022]
Abstract
A new copper‐catalyzed reaction for the stereo‐ and regioselective synthesis of alkenyl diboronates and allenyl boronates is presented. In this process propargyl derivatives of strained three/four‐membered rings were employed as substrates and B2pin2 was used as the boronate source. Selective formation of the alkenyl diboronate versus the allenyl boronate products was controlled by the choice of phosphine ligand.
Collapse
Affiliation(s)
- Jian Zhao
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Sweden.
| |
Collapse
|
25
|
Protecting group-free, selective cross-coupling of alkyltrifluoroborates with borylated aryl bromides via photoredox/nickel dual catalysis. Proc Natl Acad Sci U S A 2015; 112:12026-9. [PMID: 26371299 DOI: 10.1073/pnas.1509715112] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Orthogonal reactivity modes offer substantial opportunities for rapid construction of complex small molecules. However, most strategies for imparting orthogonality to cross-coupling reactions rely on differential protection of reactive sites, greatly reducing both atom and step economies. Reported here is a strategy for orthogonal cross-coupling wherein a mechanistically distinct activation mode for transmetalation of sp(3)-hybridized organoboron reagents enables C-C bond formation in the presence of various protected and unprotected sp(2)-hybridized organoborons. This manifold has the potential for broad application, because orthogonality is inherent to the activation mode itself. The diversification potential of this platform is shown in the rapid elaboration of a trifunctional lynchpin through various transition metal-catalyzed processes without nonproductive deprotection or functional group manipulation steps.
Collapse
|
26
|
Ardolino MJ, Morken JP. Branched/linear selectivity in palladium-catalyzed allyl-allyl cross-couplings: The role of ligands. Tetrahedron 2015; 71:6409-6413. [PMID: 26279591 DOI: 10.1016/j.tet.2015.05.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
While Pd-catalyzed allyl-allyl cross-couplings in the presence of small-bite-angle bidentate ligands reliably furnish the branched regioisomer with high levels of selectivity, cross-couplings in the presence of large-bite-angle bidentate ligands give varying, often unpredictable, levels of selectivity. In a combined computational and experimental study, we probe the underlying features that govern the regioselectivity in these metal-catalyzed cross-couplings.
Collapse
Affiliation(s)
| | - James P Morken
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467
| |
Collapse
|
27
|
Cherney AH, Kadunce NT, Reisman SE. Enantioselective and Enantiospecific Transition-Metal-Catalyzed Cross-Coupling Reactions of Organometallic Reagents To Construct C-C Bonds. Chem Rev 2015; 115:9587-652. [PMID: 26268813 PMCID: PMC4566132 DOI: 10.1021/acs.chemrev.5b00162] [Citation(s) in RCA: 625] [Impact Index Per Article: 69.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Alan H Cherney
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Nathaniel T Kadunce
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Sarah E Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| |
Collapse
|
28
|
The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2013. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.09.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
29
|
Huang L, Wang J, Wei X, Wei H. Does a multiply bonded oxo ligand directly participate in B–H bond activation by a high-valent di-oxo-molybdenum(vi) complex? A density functional theory study. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00177c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The multiply bonded oxo ligand does not participate in the activation of the B–H bond with organic substrates of amides, amines, and nitriles by the high-valent oxo-molybdenum complex MoO2Cl2.
Collapse
Affiliation(s)
- Liangfang Huang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Jiandi Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Xiaoqin Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| | - Haiyan Wei
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Provincial Key Laboratory for NSLSCS
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
| |
Collapse
|
30
|
Schuster C, Coombs JR, Kasun ZA, Morken JP. Enantioselective carbocycle formation through intramolecular Pd-catalyzed allyl-aryl cross-coupling. Org Lett 2014; 16:4420-3. [PMID: 25105510 PMCID: PMC4156259 DOI: 10.1021/ol5019163] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Indexed: 12/15/2022]
Abstract
Aryl electrophiles containing tethered allylboronate units undergo efficient intramolecular coupling in the presence of a chiral palladium catalyst to give enantioenriched carbocyclic products. The reaction is found to be quite general, affording 5, 6, and 7-membered carbocyclic products as single regioisomers and with moderate enantioselectivities. Examination of differential coupling partners points to rapid allyl-equilibration as a key stereodefining feature.
Collapse
Affiliation(s)
- Christopher
H. Schuster
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - John R. Coombs
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Zachary A. Kasun
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - James P. Morken
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| |
Collapse
|
31
|
Jang H, Jung B, Hoveyda AH. Catalytic enantioselective protoboration of disubstituted allenes. Access to alkenylboron compounds in high enantiomeric purity. Org Lett 2014; 16:4658-61. [PMID: 25153792 PMCID: PMC4156252 DOI: 10.1021/ol5022417] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Indexed: 11/30/2022]
Abstract
Proto-boryl additions to 1,1-disubstituted allenes in the presence of 1.0-5.0 mol % of chiral NHC-Cu complexes, B2(pin)2, and t-BuOH proceed to afford alkenyl-B(pin) products in up to 98% yield, >98:2 site selectivity, and 98:2 er. The enantiomerically enriched alkenylboron products can be converted to otherwise difficult-to-access alkenyl bromides, methyl ketones or carboxylic acids. What's more, the corresponding boronic acids may be used in highly stereoselective NHC-Cu-catalyzed allylic substitution reactions.
Collapse
Affiliation(s)
| | | | - Amir H. Hoveyda
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| |
Collapse
|
32
|
Ardolino MJ, Morken JP. Congested C-C bonds by Pd-catalyzed enantioselective allyl-allyl cross-coupling, a mechanism-guided solution. J Am Chem Soc 2014; 136:7092-100. [PMID: 24720611 PMCID: PMC4211291 DOI: 10.1021/ja502280w] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Under the influence of a chiral bidentate diphosphine ligand, the Pd-catalyzed asymmetric cross-coupling of allylboron reagents and allylic electrophiles establishes 1,5-dienes with adjacent stereocenters in high regio- and stereoselectivity. A mechanistic study of the coupling utilizing reaction calorimetry and density functional theory analysis suggests that the reaction operates through an inner-sphere 3,3'-reductive elimination pathway, which is both rate-defining and stereodefining. Coupled with optimized reaction conditions, this mechanistic detail is used to expand the scope of allyl-allyl couplings to allow the generation of 1,5-dienes with tertiary centers adjacent to quaternary centers as well as a unique set of cyclic structures.
Collapse
Affiliation(s)
- Michael J. Ardolino
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - James P. Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| |
Collapse
|
33
|
Le H, Batten A, Morken JP. Catalytic stereospecific allyl-allyl cross-coupling of internal allyl electrophiles with AllylB(pin). Org Lett 2014; 16:2096-9. [PMID: 24702203 PMCID: PMC3998767 DOI: 10.1021/ol500456s] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
![]()
Application of internal electrophiles
in catalytic stereospecific
allyl–allyl cross-coupling enable the rapid construction of
multisubstituted 1,5-dienes, including those with all carbon quaternary
centers. Compounds with minimal steric differentiation can be synthesized
with high enantiomeric excess.
Collapse
Affiliation(s)
- Hai Le
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | | | | |
Collapse
|
34
|
Yang ZD, Pal R, Hoang GL, Zeng XC, Takacs JM. Mechanistic Insights into Carbonyl-Directed Rhodium-Catalyzed Hydroboration: ab Initio Study of a Cyclic γ,δ-Unsaturated Amide. ACS Catal 2014; 4:763-773. [PMID: 24804151 PMCID: PMC3985861 DOI: 10.1021/cs401023j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 01/19/2014] [Indexed: 12/15/2022]
Abstract
![]()
A two-point binding mechanism for
the cationic rhodium(I)-catalyzed
carbonyl-directed catalytic asymmetric hydroboration of a cyclic γ,δ-unsaturated
amide is investigated using density functional theory. Geometry optimizations
and harmonic frequency calculations for the model reaction are carried
out using the basis set 6-31+G** for C, O, P, B, N, and H and LANL2DZ
for Rh atoms. The Gibbs free energy of each species in THF solvent
is obtained based on the single-point energy computed using the PCM
model at the ECP28MWB/6-311+G(d,p) level plus the thermal correction
to Gibbs free energy by deducting translational entropy contribution.
The Rh-catalyzed reaction cycle involves the following sequence of
events: (1) chelation of the cyclic γ,δ-unsaturated amide
via alkene and carbonyl complexation in a model active catalytic species,
[Rh(L2)2S2]+, (2) oxidative
addition of pinacol borane (pinBH), (3) migratory insertion of the
alkene double bond into Rh–H (preferred pathway) or Rh–B
bond, (4) isomerization of the resulting intermediate, and finally,
(5) reductive elimination to form the B–C or H–C bond
with regeneration of the catalyst. Free energy profiles for potential
pathways leading to the major γ-borylated product are computed
and discussed in detail. The potential pathways considered include
(1) pathways proceeding via migratory insertion into the Rh–H
bond (pathways I, I-1, and I-2), (2) a potential pathway proceeding via migratory insertion into
the Rh–B bond (pathway II), and two potential
competing routes to a β-borylated byproduct (pathway III). The results find that the Rh–H migratory insertion pathway I-2, followed in sequence by an unanticipated isomerization
via amide rotation and reductive elimination, is the most favorable
reaction pathway. A secondary consequence of amide rotation is access
to a competing β-hydride elimination pathway. The pathways computed
in this study are supported by and help explain related experimental
results.
Collapse
Affiliation(s)
- Zhao-Di Yang
- Key Laboratory
of Green Chemical Engineering and Technology of College of Heilongjiang
Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, People’s Republic of China
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Rhitankar Pal
- Department
of Chemistry, Yale University, New Haven, Connecticut 06518, United States
| | - Gia L. Hoang
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Xiao Cheng Zeng
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - James M. Takacs
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| |
Collapse
|
35
|
Hamilton JY, Sarlah D, Carreira EM. Iridium-Catalyzed Enantioselective Allyl–Alkene Coupling. J Am Chem Soc 2014; 136:3006-9. [DOI: 10.1021/ja412962w] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- James Y. Hamilton
- Eidgenössische Technische Hochschule Zürich, HCI H335, 8093 Zürich, Switzerland
| | - David Sarlah
- Eidgenössische Technische Hochschule Zürich, HCI H335, 8093 Zürich, Switzerland
| | - Erick M. Carreira
- Eidgenössische Technische Hochschule Zürich, HCI H335, 8093 Zürich, Switzerland
| |
Collapse
|
36
|
Ardolino MJ, Eno MS, Morken JP. Stereocontrol in Palladium-Catalyzed Propargylic Substitutions: Kinetic Resolution to give Enantioenriched 1,5-Enynes and Propargyl Acetates. Adv Synth Catal 2013; 355:3413-3419. [PMID: 24839434 PMCID: PMC4019443 DOI: 10.1002/adsc.201300720] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Kinetic resolution during the catalytic allyl-propargyl cross-coupling with chiral starting materials can be accomplished with a chiral Palladium catalyst. These reactions offer ready access to enantiomerically enriched enyne products from simple readily available starting materials.
Collapse
Affiliation(s)
| | - Meredith S. Eno
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467 (USA)
| | - James P. Morken
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467 (USA)
| |
Collapse
|