1
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Mondal BD, Gorai S, Nath R, Paul A, Guin J. Enantioselective Amination of 3-Substituted-2-benzofuranones via Non-covalent N-Heterocyclic Carbene Catalysis. Chemistry 2024; 30:e202303115. [PMID: 37997460 DOI: 10.1002/chem.202303115] [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: 09/25/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 11/25/2023]
Abstract
Herein, an efficient method for asymmetric α-amination of 2-benzofuranones with N-heterocyclic carbene (NHC) catalysis is reported. The process is based on non-covalent interaction of NHC with substrate, facilitating the formation of a chiral ion-pair that encompasses enolate and azolium salt. The activated enolate adds to an electrophilic amine source with sufficient facial control to furnish an enantioenriched product having an amine substituted quaternary stereocenter. The process displays a broad substrate scope. A preparative scale synthesis has been achieved. Preliminary mechanistic investigations based on experimental and DFT studies suggest a reaction pathway that involves non-covalent substrate/NHC interactions and essentially implicate the role of π-π interaction in diastereomeric transition states for stereo-chemical discrimination.
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Affiliation(s)
- Bhaskar Deb Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Sadhan Gorai
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Rounak Nath
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Ankan Paul
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
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2
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Fritsche RF, Schuh T, Kataeva O, Knölker HJ. Atroposelective Synthesis of 2,2'-Bis(arylamino)-1,1'-biaryls by Oxidative Iron(III)- and Phosphoric Acid-Catalyzed C-C Coupling of Diarylamines. Chemistry 2023; 29:e202203269. [PMID: 36269611 PMCID: PMC10100243 DOI: 10.1002/chem.202203269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Indexed: 11/07/2022]
Abstract
We describe an iron-catalyzed asymmetric oxidative C-C coupling of diarylamines which proceeds at room temperature with air as final oxidant. Using hexadecafluorophthalocyanine-iron(II) as catalyst in the presence of catalytic amounts of an axially chiral biaryl phosphoric acid, the resulting chiral 2,2'-diamino-1,1'-biaryls are obtained in up to 90 % ee as confirmed by chiral HPLC. A detailed mechanism has been proposed with a radical cation-chiral phosphate ion pair as key intermediate leading to the observed asymmetric induction.
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Affiliation(s)
- Raphael F Fritsche
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Tristan Schuh
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Olga Kataeva
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Hans-Joachim Knölker
- Fakultät Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
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3
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Nishimura K, Ogura Y, Takeda K, Guo W, Ishihara K. Chiral π-Cu(II) Catalysts for the Enantioselective α-Amination of N-Acyl-3,5-dimethylpyrazoles. Org Lett 2022; 24:7685-7689. [PMID: 36215133 DOI: 10.1021/acs.orglett.2c03249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the highly enantioselective α-amination of N-acyl-3,5-dimethylpyrazoles with dialkyl azodicarboxylates, catalyzed by in situ generated π-Cu(II) complexes that consist of Cu(OTf)2 and N-(5H-dibenzo[a,d][7]annulen-5-yl)-l-alanine-derived amides, to give the corresponding products as d-α-amino acid derivatives (up to >99% yield and 99% ee). The site-selectivity and enantioselectivity can be satisfactorily explained by the coordination of dialkyl azodicarboxylate with π-Cu(II) complex. The synthetic potential of this one-pot transformation to the α-amino ester is also described.
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Affiliation(s)
- Kazuki Nishimura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Yoshihiro Ogura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Kazuki Takeda
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Weiwei Guo
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
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4
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Xiong H, Yoshida K, Okada K, Ueda H, Tokuyama H. Catalytic enantioselective 5-endo-bromocycloetherification of unactivated cyclic alkenes. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Wu Z, Krishnamurthy S, Satyanarayana Tummalapalli KS, Xu J, Yue C, Antilla JC. Enantioselective Amination of
β
‐Keto Esters Catalyzed by Chiral Calcium Phosphates. Chemistry 2022; 28:e202200907. [DOI: 10.1002/chem.202200907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Zhenwei Wu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Suvratha Krishnamurthy
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - K. S. Satyanarayana Tummalapalli
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Jun Xu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Caizhen Yue
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
| | - Jon C. Antilla
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
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6
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Wang Y, Yihuo A, Wang L, Dong S, Feng X. Catalytic asymmetric synthesis of chiral azo compounds via interrupted Japp-Klingemann reaction with aryldiazonium salts. Sci China Chem 2022. [DOI: 10.1007/s11426-021-1149-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Fu C, Xiong Q, Xiao L, He L, Bai T, Zhang Z, Dong X, Wang C. Stereodivergent Synthesis of Carbocyclic Quaternary
α‐Amino
Acid Derivatives Containing Two Contiguous Stereocenters. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100824] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Cong Fu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Qi Xiong
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Lu Xiao
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Shanghai 230021 China
| | - Ling He
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Tian Bai
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Zongpeng Zhang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Xiu‐Qin Dong
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
- Suzhou Institute of Wuhan University Suzhou Jiangsu 215123 P. R. China
| | - Chun‐Jiang Wang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Shanghai 230021 China
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8
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He F, Shen G, Yang X. Asymmetric Aminations and Kinetic Resolution of Acyclic
α‐Branched
Ynones. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100514] [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)
- Faqian He
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
- University of Chinese Academy of Sciences Beijing 100049 China
- Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China
| | - Guosong Shen
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Xiaoyu Yang
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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9
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Highly Regioselective Tandem Reaction of Ene-Yne-Oxazolones Induced by H-Phosphonates: Construction of Phosphinylindane Derivatives. J Org Chem 2021; 86:9360-9383. [PMID: 34213338 DOI: 10.1021/acs.joc.1c00609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly regioselective divergent approach for the phosphine-containing indane/indene derivatives from the ene-yne-oxazolone precursors was reported. An insight into the reaction mechanism involving the phospha-1,4-addition followed by 5-exo-dig ring closure with a concomitant C-P/C-C bond formation was also proposed. This promising protocol utilized H-phosphonate as the phosphonating reagent in a silver-catalyzed or base-mediated cascade cyclization to construct the corresponding phosphorylated spiroindenoxazolones and amidoindenes, respectively, in good yields (up to 88% yield).
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10
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Zhang T, Li WA, Shen HC, Chen SS, Han ZY. Chiral-Anion-Mediated Asymmetric Heck–Matsuda Reaction of Acyclic Alkenyl Alcohols. Org Lett 2021; 23:1473-1477. [DOI: 10.1021/acs.orglett.1c00152] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Tao Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | | | | | | | - Zhi-Yong Han
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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11
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He F, Wang J, Zhou F, Tao H, Yang X. Regio- and enantioselective amination of acyclic branched α-alkynyl ketones: asymmetric construction of N-containing quaternary stereocenters. Org Chem Front 2021. [DOI: 10.1039/d1qo00720c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Direct regio- and enantioselective amination of acyclic α-branched ketones enabled by the α-alkynyl group.
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Affiliation(s)
- Faqian He
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Shanghai Institute of Organic Chemistry, Shanghai 200032, China
| | - Jiawen Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Fang Zhou
- iHuman Institute, ShanghaiTech University, Shanghai 201210, China
| | - Houchao Tao
- iHuman Institute, ShanghaiTech University, Shanghai 201210, China
| | - Xiaoyu Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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12
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Liu R, Krishnamurthy S, Wu Z, Tummalapalli KSS, Antilla JC. Chiral Calcium Phosphate Catalyzed Enantioselective Amination of 3-Aryl-2-benzofuranones. Org Lett 2020; 22:8101-8105. [PMID: 32969228 DOI: 10.1021/acs.orglett.0c03059] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A 4-tert-butyl-phenyl substituted (R)-[H8]-BINOL chiral calcium phosphate catalyzed enantioselective amination of 3-aryl-2-benzofuranones with dibenzyl azodicarboxylate is described. The catalyst loading of the reaction is 1 mol %. This transformation is facile and has a high degree atom economy, which gave products with good yields and high enantioselectivities (79% to 99%). This reaction has excellent ee and a broad substrate scope with mild reaction conditions.
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Affiliation(s)
- Ruihan Liu
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Suvratha Krishnamurthy
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Zhenwei Wu
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | | | - Jon C Antilla
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China.,School of Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
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13
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Huang B, He Y, Levin MD, Coelho JAS, Bergman RG, Toste FD. Enantioselective Kinetic Resolution/Desymmetrization of Para-Quinols: A Case Study in Boronic-Acid-Directed Phosphoric Acid Catalysis. Adv Synth Catal 2020; 362:295-301. [PMID: 34093103 DOI: 10.1002/adsc.201900816] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A chiral phosphoric acid-catalyzed kinetic resolution and desymmetrization of para-quinols operating via oxa-Michael addition was developed and subsequently subjected to mechanistic study. Good to excellent s-factors/enantioselectivities were obtained over a broad range of substrates. Kinetic studies were performed, and DFT studies favor a hydrogen bonding activation mode. The mechanistic studies provide insights to previously reported chiral anion phase transfer reactions involving chiral phosphate catalysts in combination with boronic acids.
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Affiliation(s)
- Banruo Huang
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
| | - Ying He
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
| | - Mark D Levin
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
| | - Jaime A S Coelho
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA).,Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Robert G Bergman
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
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14
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Santra S, Maji U, Guin J. Enantioselective α-Amination of Acyclic 1,3-Dicarbonyls Catalyzed by N-Heterocyclic Carbene. Org Lett 2020; 22:468-473. [PMID: 31913633 DOI: 10.1021/acs.orglett.9b04232] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herein, we describe a method for the catalytic enantioselective α-amination of α-substituted acyclic 1,3-ketoamides and 1,3-amidoesters that affords the products possessing N-substituted quaternary stereocenters with a chiral N-heterocyclic carbene (NHC). The reaction is based on the utilization of an intrinsic Brønsted base characteristic of NHC that enables the catalytic formation of a chiral ion pair comprising the enolate and the azolium ion. A series of challenging open-chain α-substituted 1,3-dicarbonyls are aminated via this method with ee's of ≤99%.
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Affiliation(s)
- Surojit Santra
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja S. C. Mullick Road , Jadavpur , Kolkata 700032 , India
| | - Ujjwal Maji
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja S. C. Mullick Road , Jadavpur , Kolkata 700032 , India
| | - Joyram Guin
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja S. C. Mullick Road , Jadavpur , Kolkata 700032 , India
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15
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Liu B, Qiu H, Chen X, Li W, Zhang J. Copper-catalyzed asymmetric tandem borylative addition and aldol cyclization. Org Chem Front 2020. [DOI: 10.1039/d0qo00654h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly enantioselective asymmetric copper-catalyzed tandem conjugate addition/aldol cyclization of electron-deficient olefins with B2pin2 was developed, which provided a rapid access to indanes bearing three consecutive chiral stereogenic centers.
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Affiliation(s)
- Bing Liu
- National Doping Test Laboratory Shanghai
- Shanghai University of Sport
- Shanghai
- P. R. China
| | - Haile Qiu
- Department of Chemistry
- East China Normal University
- Shanghai
- P. R. China
| | - Xiaofeng Chen
- Department of Chemistry
- East China Normal University
- Shanghai
- P. R. China
| | - Wenbo Li
- Department of Chemistry
- East China Normal University
- Shanghai
- P. R. China
| | - Junliang Zhang
- Department of Chemistry
- Fudan University
- Shanghai 200438
- P. R. China
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16
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Trost BM, Tracy JS, Lin EY. Asymmetric Electrophilic Amination and Hydrazination of Acyclic α-Branched Ketones for the Formation of α-Tertiary Amines and Hydrazines. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04246] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
| | - Jacob S. Tracy
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
| | - Eric Y. Lin
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
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17
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Abstract
A boron-catalyzed α-amination of simple carboxylic acids was developed. Catalytically generated boron enolates of carboxylic acids reacted with an electrophilic aminating reagent, diisopropylazodicarboxylate, to provide amino acid derivatives. The catalysis afforded not only α-monosubstituted glycine derivatives but also α,α-disubstituted derivatives. The resulting α-aminocarboxylic acid was easily converted to carboxylic acid derivatives. Extension to a catalytic asymmetric variant was possible by introducing a chiral ligand on the boron catalyst.
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Affiliation(s)
- Takuto Morisawa
- Department of Chemistry, Faculty of Science , Hokkaido University , Kita 10 Nishi 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
| | - Masaya Sawamura
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Kita 21 Nishi 10, Kita-ku , Sapporo , Hokkaido 001-0021 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Kita 10 Nishi 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
| | - Yohei Shimizu
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Kita 21 Nishi 10, Kita-ku , Sapporo , Hokkaido 001-0021 , Japan.,Department of Chemistry, Faculty of Science , Hokkaido University , Kita 10 Nishi 8, Kita-ku , Sapporo , Hokkaido 060-0810 , Japan
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18
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Zhang P, Xing M, Guan Q, Zhang J, Zhao Q, Zhang C. Pd-Catalyzed Stereoselective 1,2-Aryboration of Alkenylarenes. Org Lett 2019; 21:8106-8109. [DOI: 10.1021/acs.orglett.9b03114] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Penglin Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, Institute of Molecular Plus, Tianjin University, Weijin Rd. 92, Tianjin 300072, China
| | - Mimi Xing
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, Institute of Molecular Plus, Tianjin University, Weijin Rd. 92, Tianjin 300072, China
| | - Qitao Guan
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, Institute of Molecular Plus, Tianjin University, Weijin Rd. 92, Tianjin 300072, China
| | - Jinguo Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, Institute of Molecular Plus, Tianjin University, Weijin Rd. 92, Tianjin 300072, China
| | - Qian Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, Institute of Molecular Plus, Tianjin University, Weijin Rd. 92, Tianjin 300072, China
| | - Chun Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, Institute of Molecular Plus, Tianjin University, Weijin Rd. 92, Tianjin 300072, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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19
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Kurandina D, Yadagiri D, Rivas M, Kavun A, Chuentragool P, Hayama K, Gevorgyan V. Transition-Metal- and Light-Free Directed Amination of Remote Unactivated C(sp 3)-H Bonds of Alcohols. J Am Chem Soc 2019; 141:8104-8109. [PMID: 31046256 DOI: 10.1021/jacs.9b04189] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Due to the great value of amino alcohols, new methods for their synthesis are in high demand. Abundant aliphatic alcohols represent the ideal feedstock for the method development toward this important motif. To date, transition-metal-catalyzed approaches for the directed remote amination of alcohols have been well established. Yet, they have certain disadvantages such as the use of expensive catalysts and limited scope. Very recently, transition-metal-free visible-light-induced radical approaches have emerged as new powerful tools for directed remote amination of alcohols. Relying on 1,5-HAT reactivity, these methods are limited to β - or δ-amination only. Herein, we report a novel transition-metal- and visible-light-free room-temperature radical approach for remote β -, γ-, and δ-C(sp3)-N bond formation in aliphatic alcohols using mild basic conditions and readily available diazonium salt reagents.
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Affiliation(s)
- Daria Kurandina
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor Street, Rm. 4500 , Chicago , Illinois 60607 , United States
| | - Dongari Yadagiri
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor Street, Rm. 4500 , Chicago , Illinois 60607 , United States
| | - Mónica Rivas
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor Street, Rm. 4500 , Chicago , Illinois 60607 , United States
| | - Aleksei Kavun
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor Street, Rm. 4500 , Chicago , Illinois 60607 , United States
| | - Padon Chuentragool
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor Street, Rm. 4500 , Chicago , Illinois 60607 , United States
| | - Keiichi Hayama
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor Street, Rm. 4500 , Chicago , Illinois 60607 , United States
| | - Vladimir Gevorgyan
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor Street, Rm. 4500 , Chicago , Illinois 60607 , United States
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20
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Reddi Y, Tsai CC, Avila CM, Toste FD, Sunoj RB. Harnessing Noncovalent Interactions in Dual-Catalytic Enantioselective Heck-Matsuda Arylation. J Am Chem Soc 2018; 141:998-1009. [PMID: 30562010 DOI: 10.1021/jacs.8b11062] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The use of more than one catalyst in one-pot reaction conditions has become a rapidly evolving protocol in the development of asymmetric catalysis. The lack of molecular insights on the mechanism and enantioselectivity in dual-catalytic reactions motivated the present study focusing on an important catalytic asymmetric Heck-Matsuda cross-coupling. A comprehensive density functional theory (M06 and B3LYP-D3) investigation of the coupling between a spirocyclic cyclopentene and 4-fluorophenyl diazonium species under a dual-catalytic condition involving Pd2(dba)3 (dba = trans, trans-dibenzylideneacetone) and chiral 2,2'-binaphthyl diamine (BINAM)-derived phosphoric acids (BDPA, 2,2'-binaphthyl diamine-derived phosphoric acids) is presented. Among various mechanistic possibilities examined, the pathway with explicit inclusion of the base (in situ generated sodium bicarbonate/sodium biphosphate) is found to be energetically more preferred over the analogous base-free routes. The chiral phosphate generated by the action of sodium carbonate on BDPA is found to remain associated with the reaction site as a counterion. The initial oxidative addition of Pd(0) to the aryl diazonium bond gives rise to a Pd-aryl intermediate, which then goes through the enantiocontrolling migratory insertion to the cyclic alkene, leading to an arylated cycloalkene intermediate. Insights on how a series of noncovalent interactions, such as C-H···O, C-H···N, C-H···F, C-H···π, lp···π, O-H···π, and C-F···π, in the enantiocontrolling transition state (TS) render the migration of the Pd-aryl to the si prochiral face of the cyclic alkene more preferred over that to the re face are utilized for modulating the enantioselectivity. Aided by molecular insights on the enantiocontrolling transition states, we predicted improved enantioselectivity from 37% to 89% by changes in the N-aryl substituents of the catalyst. Subsequent experiments in our laboratory offered very good agreement with the predicted enantioselectivities.
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Affiliation(s)
- Yernaidu Reddi
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India
| | - Cheng-Che Tsai
- Department of Chemistry , University of California Berkeley , Berkeley , California 94720 , United States
| | - Carolina M Avila
- Department of Chemistry , University of California Berkeley , Berkeley , California 94720 , United States
| | - F Dean Toste
- Department of Chemistry , University of California Berkeley , Berkeley , California 94720 , United States
| | - Raghavan B Sunoj
- Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India
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21
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Trost BM, Tracy JS, Saget T. Direct catalytic enantioselective amination of ketones for the formation of tri- and tetrasubstituted stereocenters. Chem Sci 2018; 9:2975-2980. [PMID: 29719678 PMCID: PMC5897889 DOI: 10.1039/c8sc00147b] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 02/13/2018] [Indexed: 11/21/2022] Open
Abstract
A Zn–ProPhenol catalyzed direct amination of α-branched and unbranched ketones produces α-amino carbonyl and β-amino alcohol products.
Herein, we report a Zn–ProPhenol catalyzed direct asymmetric amination reaction of unactivated aryl and vinyl ketones using di-tert-butyl azodicarboxylate as a cheap and practical electrophilic nitrogen source. Importantly, this methodology works with both α-branched and unbranched ketones for the construction of tri- and tetrasubstituted N-containing stereocenters. The reaction can be run at gram-scale with low catalyst loadings and features a recoverable and reusable ligand. Finally, the enantioenriched hydrazine products can be readily converted into versatile building blocks such as α-amino carbonyl compounds and β-amino alcohols.
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Affiliation(s)
- B M Trost
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
| | - J S Tracy
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
| | - T Saget
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
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22
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Schörgenhumer J, Tiffner M, Waser M. Chiral phase-transfer catalysis in the asymmetric α-heterofunctionalization of prochiral nucleophiles. Beilstein J Org Chem 2017; 13:1753-1769. [PMID: 28904619 PMCID: PMC5588627 DOI: 10.3762/bjoc.13.170] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 08/10/2017] [Indexed: 01/10/2023] Open
Abstract
Chiral phase-transfer catalysis is one of the major catalytic principles in asymmetric catalysis. A broad variety of different catalysts and their use for challenging applications have been reported over the last decades. Besides asymmetric C–C bond forming reactions the use of chiral phase-transfer catalysts for enantioselective α-heterofunctionalization reactions of prochiral nucleophiles became one of the most important field of application of this catalytic principle. Based on several highly spectacular recent reports, we thus wish to discuss some of the most important achievements in this field within the context of this review.
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Affiliation(s)
- Johannes Schörgenhumer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - Maximilian Tiffner
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
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23
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Avila CM, Patel JS, Reddi Y, Saito M, Nelson HM, Shunatona HP, Sigman MS, Sunoj RB, Toste FD. Enantioselective Heck-Matsuda Arylations through Chiral Anion Phase-Transfer of Aryl Diazonium Salts. Angew Chem Int Ed Engl 2017; 56:5806-5811. [PMID: 28418118 PMCID: PMC5528849 DOI: 10.1002/anie.201702107] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 03/26/2017] [Indexed: 11/10/2022]
Abstract
A mild, asymmetric Heck-Matsuda reaction of five-, six- and seven-membered ring alkenes and aryl diazonium salts is presented. High yields and enantioselectivities were achieved using Pd0 and chiral anion co-catalysts, the latter functioning as a chiral anion phase-transfer (CAPT) reagent. For certain substrate classes, the chiral anion catalysts were modulated to minimize the formation of undesired by-products. More specifically, BINAM-derived phosphoric acid catalysts were shown to prevent alkene isomerization in cyclopentene and cycloheptene starting materials. DFT(B3LYP-D3) computations revealed that increased product selectivity resulted from a chiral anion dependent lowering of the activation barrier for the desired pathway.
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Affiliation(s)
- Carolina M Avila
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Jigar S Patel
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Yernaidu Reddi
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - Masato Saito
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Hosea M Nelson
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
- Current address: Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095-1569, USA
| | - Hunter P Shunatona
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Raghavan B Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
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24
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Avila CM, Patel JS, Reddi Y, Saito M, Nelson HM, Shunatona HP, Sigman MS, Sunoj RB, Toste FD. Enantioselective Heck-Matsuda Arylations through Chiral Anion Phase-Transfer of Aryl Diazonium Salts. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702107] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Carolina M. Avila
- Department of Chemistry; University of California; Berkeley CA 94720 USA
| | - Jigar S. Patel
- Department of Chemistry; University of California; Berkeley CA 94720 USA
| | - Yernaidu Reddi
- Department of Chemistry; Indian Institute of Technology Bombay; Powai Mumbai 400076 India
| | - Masato Saito
- Department of Chemistry; University of California; Berkeley CA 94720 USA
| | - Hosea M. Nelson
- Department of Chemistry; University of California; Berkeley CA 94720 USA
- Current address: Department of Chemistry and Biochemistry; University of California; Los Angeles CA 90095-1569 USA
| | | | - Matthew S. Sigman
- Department of Chemistry; University of Utah; 315 South 1400 East Salt Lake City UT 84112 USA
| | - Raghavan B. Sunoj
- Department of Chemistry; Indian Institute of Technology Bombay; Powai Mumbai 400076 India
| | - F. Dean Toste
- Department of Chemistry; University of California; Berkeley CA 94720 USA
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25
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Zhang ZL, Wang WL, Liu SL, Chen DM. Experimental and Density Functional Theory Calculation Studies on Raman and Infrared Spectra of 1,1′-Binaphthyl-2,2′-diamine. CHINESE J CHEM PHYS 2017. [DOI: 10.1063/1674-0068/30/cjcp1606118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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26
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Shang M, Wang X, Koo SM, Youn J, Chan JZ, Yao W, Hastings BT, Wasa M. Frustrated Lewis Acid/Brønsted Base Catalysts for Direct Enantioselective α-Amination of Carbonyl Compounds. J Am Chem Soc 2016; 139:95-98. [DOI: 10.1021/jacs.6b11908] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ming Shang
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xiaoxu Wang
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Seung Moh Koo
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Jennifer Youn
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Jessica Z. Chan
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Wenzhi Yao
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Brian T. Hastings
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Masayuki Wasa
- Department of Chemistry,
Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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27
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Yang Z, He Y, Toste FD. Biomimetic Approach to the Catalytic Enantioselective Synthesis of Flavonoids. J Am Chem Soc 2016; 138:9775-8. [PMID: 27472195 PMCID: PMC5149420 DOI: 10.1021/jacs.6b05939] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein is reported the direct asymmetric addition of phenol nucleophiles to benzopyrylium salts as a means to produce enantioenriched flavonoid-like compounds. This enantioselective C-C bond construction was achieved through a chiral anion phase-transfer strategy that mimics the proposed biosynthesis of this structurally diverse set of natural products. The utility of this methodology was demonstrated in enantioselective synthesis of a 2,8-dioxabicyclo[3.3.1]nonane and a 2,4-diarylbenzopyran.
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Affiliation(s)
| | | | - F. Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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28
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Govender T, Arvidsson PI, Maguire GEM, Kruger HG, Naicker T. Enantioselective Organocatalyzed Transformations of β-Ketoesters. Chem Rev 2016; 116:9375-437. [PMID: 27463615 DOI: 10.1021/acs.chemrev.6b00156] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The β-ketoester structural motif continues to intrigue chemists with its electrophilic and nucleophilic sites. Proven to be a valuable tool within organic synthesis, natural product, and medicinal chemistry, reports on chiral β-ketoester molecular skeletons display a steady increase. With the reignition of organocatalysis in the past decade, asymmetric methods available for the synthesis of this structural unit has significantly expanded, making it one of the most exploited substrates for organocatalytic transformations. This review provides comprehensive information on the plethora of organocatalysts used in stereoselective organocatalyzed construction of β-ketoester-containing compounds.
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Affiliation(s)
- Thavendran Govender
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Per I Arvidsson
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa.,P. I. Arvidsson, Science for Life Laboratory, Drug Discovery and Development Platform and Division of Translational Medicine and Chemical Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet SE-171 77 Stockholm, Sweden
| | - Glenn E M Maguire
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Hendrik G Kruger
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Tricia Naicker
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
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29
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Prieto A, Bouyssi D, Monteiro N. Copper-Catalyzed Trifluoromethylation of Hydrazones Leading to the Formation of Quaternary α-Trifluoromethyl Diazenes. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600160] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Alexis Prieto
- Université Lyon 1; Institut de Chimie et Biochimie Moléculaires et Supramoléculaires; CPE Lyon; 43, Boulevard du 11 Novembre 1918 69622 Villeurbanne France
| | - Didier Bouyssi
- Université Lyon 1; Institut de Chimie et Biochimie Moléculaires et Supramoléculaires; CPE Lyon; 43, Boulevard du 11 Novembre 1918 69622 Villeurbanne France
| | - Nuno Monteiro
- Université Lyon 1; Institut de Chimie et Biochimie Moléculaires et Supramoléculaires; CPE Lyon; 43, Boulevard du 11 Novembre 1918 69622 Villeurbanne France
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30
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Neel AJ, Milo A, Sigman MS, Toste FD. Enantiodivergent Fluorination of Allylic Alcohols: Data Set Design Reveals Structural Interplay between Achiral Directing Group and Chiral Anion. J Am Chem Soc 2016; 138:3863-75. [PMID: 26967114 PMCID: PMC5176255 DOI: 10.1021/jacs.6b00356] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Enantioselectivity values represent relative rate measurements that are sensitive to the structural features of the substrates and catalysts interacting to produce them. Therefore, well-designed enantioselectivity data sets are information rich and can provide key insights regarding specific molecular interactions. However, if the mechanism for enantioselection varies throughout a data set, these values cannot be easily compared. This premise, which is the crux of free energy relationships, exposes a challenging issue of identifying mechanistic breaks within multivariate correlations. Herein, we describe an approach to addressing this problem in the context of a chiral phosphoric acid catalyzed fluorination of allylic alcohols using aryl boronic acids as transient directing groups. By designing a data set in which both the phosphoric and boronic acid structures were systematically varied, key enantioselectivity outliers were identified and analyzed. A mechanistic study was executed to reveal the structural origins of these outliers, which was consistent with the presence of several mechanistic regimes within the data set. While 2- and 4-substituted aryl boronic acids favored the (R)-enantiomer with most of the studied catalysts, meta-alkoxy substituted aryl boronic acids resulted in the (S)-enantiomer when used in combination with certain (R)-phosphoric acids. We propose that this selectivity reversal is the result of a lone pair-π interaction between the substrate ligated boronic acid and the phosphate. On the basis of this proposal, a catalyst system was identified, capable of producing either enantiomer in high enantioselectivity (77% (R)-2 to 92% (S)-2) using the same chiral catalyst by subtly changing the structure of the achiral boronic acid.
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Affiliation(s)
- Andrew J. Neel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Anat Milo
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - F. Dean Toste
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720, United States
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31
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Tahara YK, Obinata S, Kanyiva KS, Shibata T, Mándi A, Taniguchi T, Monde K. Enantioselective Synthesis of Aminoindan Carboxylic Acid Derivatives by the Catalytic Intramolecular [2+2+2] Cycloaddition of Amino-Acid-Tethered Triynes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501612] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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32
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Kaneko S, Kumatabara Y, Shirakawa S. A new generation of chiral phase-transfer catalysts. Org Biomol Chem 2016; 14:5367-76. [PMID: 26754659 DOI: 10.1039/c5ob02446c] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Phase-transfer catalysis has long been recognized as a versatile method for organic synthesis. In particular, over more than the past three decades, asymmetric phase-transfer catalysis based on the use of structurally well-defined chiral catalysts has become a topic of great scientific interest. Although various effective chiral catalysts have already been reported and these catalysts were utilized for practical asymmetric transformations, further design and development of new chiral phase-transfer catalysts are still attractive research subjects in organic chemistry due to the high utility and practicability of phase-transfer-catalyzed reactions. This review focuses on the recent examples of newly designed effective chiral phase-transfer catalysts.
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Affiliation(s)
- Shiho Kaneko
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki 852-8521, Japan.
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33
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Synthetic Advances in the Indane Natural Product Scaffolds as Drug Candidates. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/b978-0-444-63932-5.00008-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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34
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Borie C, Ackermann L, Nechab M. Enantioselective syntheses of indanes: from organocatalysis to C–H functionalization. Chem Soc Rev 2016; 45:1368-86. [DOI: 10.1039/c5cs00622h] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The indanyl core is ubiquitous in a large variety of drugs and natural products. Remarkable recent progress has been accomplished in the step-economical assembly of functionalization of chiral indanes by means of enantioselective catalysis, with major progress being achieved in organocatalysis and C–H activation chemistry.
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Affiliation(s)
- Cyril Borie
- Aix Marseille Université CNRS
- ICR
- UMR 7273
- 13013 Marseille
- France
| | - Lutz Ackermann
- Institut fuer Organische und Biomolekulare Chemie
- Georg-August-Universitaet Goettingen
- 37077 Goettingen
- Germany
| | - Malek Nechab
- Aix Marseille Université CNRS
- ICR
- UMR 7273
- 13013 Marseille
- France
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35
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Zheng C, Chen WX, Chen FE. Asymmetric Amination of 3-(2-Oxoindolin-3-ylidene)butanoates Catalyzed by a Cinchona-Derived Alkaloid. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chen Zheng
- Department of Chemistry; Fudan University; 220 Handan Road Shanghai 200433 China
| | - Wen-Xue Chen
- Department of Chemistry; Fudan University; 220 Handan Road Shanghai 200433 China
| | - Fen-Er Chen
- Department of Chemistry; Fudan University; 220 Handan Road Shanghai 200433 China
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36
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Miles DH, Guasch J, Toste FD. A Nucleophilic Strategy for Enantioselective Intermolecular α-Amination: Access to Enantioenriched α-Arylamino Ketones. J Am Chem Soc 2015; 137:7632-5. [PMID: 26066512 PMCID: PMC5152760 DOI: 10.1021/jacs.5b04518] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The enantioselective addition of anilines to azoalkenes was accomplished through the use of a chiral phosphoric acid catalyst. The resulting α-arylamino hydrazones were obtained in good yields and excellent enantioselectivities and provide access to enantioenriched α-arylamino ketones. A serendipitous kinetic resolution of racemic α-arylamino hydrazones is also described.
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37
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Melis N, Ghisu L, Guillot R, Caboni P, Secci F, Aitken DJ, Frongia A. Catalytic Enantioselective Synthesis of α-(Benzylamino)cyclobutanones. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500460] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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Nelson HM, Williams BD, Miró J, Toste FD. Enantioselective 1,1-arylborylation of alkenes: merging chiral anion phase transfer with Pd catalysis. J Am Chem Soc 2015; 137:3213-3216. [PMID: 25723255 DOI: 10.1021/jacs.5b00344] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A palladium-catalyzed three-component coupling of α-olefins, aryldiazonium salts, and bis(pinacolato)diboron affords direct access to chiral benzylic boronic esters. This process is rendered highly enantioselective using an unprecedented example of cooperative chiral anion phase transfer and transition-metal catalysis.
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Affiliation(s)
- Hosea M Nelson
- Department of Chemistry, University of California, Berkeley, California 94720, United States; Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Brett D Williams
- Department of Chemistry, University of California, Berkeley, California 94720, United States; Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Javier Miró
- Department of Chemistry, University of California, Berkeley, California 94720, United States; Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States; Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
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39
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Yang X, Toste FD. Direct asymmetric amination of α-branched cyclic ketones catalyzed by a chiral phosphoric acid. J Am Chem Soc 2015; 137:3205-8. [PMID: 25719604 DOI: 10.1021/jacs.5b00229] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Here we report the direct asymmetric amination of α-substituted cyclic ketones catalyzed by a chiral phosphoric acid, yielding products with a N-containing quaternary stereocenter in high yields and excellent enantioselectivities. Kinetic resolution of the starting ketone was also found to occur on some of the substrates under milder conditions, providing enantioenriched α-branched ketones, another important building block in organic synthesis. The utility of this methodology was demonstrated in the short synthesis of (S)-ketamine, the more active enantiomer of this versatile pharmaceutical.
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Affiliation(s)
- Xiaoyu Yang
- Department of Chemistry, University of California , Berkeley, California 94720, United States
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