1
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Hu Y, Zou Y, Yang H, Ji H, Jin Y, Zhang Z, Liu Y, Zhang W. Precise Synthesis of Chiral Z-Allylamides by Cobalt-Catalyzed Asymmetric Sequential Hydrogenations. Angew Chem Int Ed Engl 2023; 62:e202217871. [PMID: 36753391 DOI: 10.1002/anie.202217871] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/09/2023]
Abstract
Asymmetric sequential hydrogenations of conjugated enynes have been developed using a Ph-BPE-CoI catalyst for the precise synthesis of chiral Z-allylamides in high activity (up to 1000 substrate/catalyst (S/C)) and with excellent enantioselectivity (up to >99 % enantiomeric excess (ee)). Mechanism experiments and theoretical calculations support a cationic CoI /CoIII redox catalytic cycle. The catalytic activity difference between cobalt complexes of Ph-BPE and QuinoxP* was explained by the process decomposition of rate-determining step in the second hydrogenation.
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Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yashi Zou
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Huiwen Yang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Haotian Ji
- Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yue Jin
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Zhenfeng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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2
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Jin Y, Zou Y, Hu Y, Han Y, Zhang Z, Zhang W. Azole-Directed Cobalt-Catalyzed Asymmetric Hydrogenation of Alkenes. Chemistry 2022; 28:e202201517. [PMID: 35622378 DOI: 10.1002/chem.202201517] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Indexed: 12/11/2022]
Abstract
The azole-directed cobalt-catalyzed asymmetric hydrogenation of alkenes has been developed with high efficiency. With this approach, chiral pyrazole compounds were obtained in quantitative yields and excellent enantioselectivities (up to 99 % ee) under mild conditions, and the hydrogenation was conducted on a gram scale with up to 2000 TON. Several useful applications were demonstrated including the convenient introduction of β-chirality to a drug intermediate containing an azole ring.
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Affiliation(s)
- Yue Jin
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Yashi Zou
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Yanhua Hu
- Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Yunxi Han
- Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Zhenfeng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China.,Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
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3
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Sudhakaran S, Shinde PG, Aratikatla EK, Kaulage SH, Rana P, Parit RS, Kavale DS, Senthilkumar B, Punji B. Nickel-Catalyzed Asymmetric Hydrogenation for the Synthesis of a Key Intermediate of Sitagliptin. Chem Asian J 2022; 17:e202101208. [PMID: 34817131 DOI: 10.1002/asia.202101208] [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: 10/22/2021] [Revised: 11/22/2021] [Indexed: 11/11/2022]
Abstract
Nickel-catalyzed enantioselective hydrogenation of enamines leading to the efficient synthesis of 3-R-Boc-amino-4-(2,4,5-trifluorophenyl)butyric esters, the key intermediate of the blockbuster antidiabetic drug (R)-SITAGLIPTIN, is described. The sitagliptin motifs were isolated in more than 99% yield and with 75-92% ee using the earth-abundant nickel catalyst. Upon chiral resolution with (R)- and (S)-1-phenylethylamines, the partially enantioenriched (R)- and (S)-Boc-3-amino-4-(2,4,5-trifluorophenyl)butanoic acids provided >99.5% ee of the crucial sitagliptin intermediate. The asymmetric hydrogenation protocol was scaled up to 10 g with consistency in yield and ee, and has been reproduced in multiple batches.
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Affiliation(s)
- Shana Sudhakaran
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Prasad G Shinde
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Eswar K Aratikatla
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Sandeep H Kaulage
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Priksha Rana
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Ratan S Parit
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Dattatry S Kavale
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Beeran Senthilkumar
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
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4
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Li K, Wei L, Sun M, Li B, Liu M, Li C. Enantioselective Synthesis of Pyridines with All‐Carbon Quaternary Carbon Centers via Cobalt‐Catalyzed Desymmetric [2+2+2] Cycloaddition. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ke Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Linsheng Wei
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Minghe Sun
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Bing Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Min Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Changkun Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
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5
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Li K, Wei L, Sun M, Li B, Liu M, Li C. Enantioselective Synthesis of Pyridines with All-Carbon Quaternary Carbon Centers via Cobalt-Catalyzed Desymmetric [2+2+2] Cycloaddition. Angew Chem Int Ed Engl 2021; 60:20204-20209. [PMID: 34213812 DOI: 10.1002/anie.202105452] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/08/2021] [Indexed: 11/08/2022]
Abstract
A Co-catalyzed enantioselective desymmetric [2+2+2] cycloaddition for synthesis of pyridines with all-carbon quaternary carbon centers has been developed. The regio- and enantioselectivities are controlled by the inherent nature of terminal alkynes and the substituents on the bisoxazolinephosphine ligands. Pyridines with 5-substitutents could be obtained with >20:1 regioselectivity and up to 94 % ee when terminal alkyl, alkenyl or silyl alkynes and DTBM/Ph-based NPN* ligand L6 were used. Terminal aryl alkynes and Ph/Bn-based ligand L4 leads to formation of pyridines with 6-substitutents in up to 99 % ee.
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Affiliation(s)
- Ke Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Linsheng Wei
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Minghe Sun
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Bing Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Min Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Changkun Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
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6
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Hu Y, Zhang Z, Liu Y, Zhang W. Cobalt-Catalyzed Chemo- and Enantioselective Hydrogenation of Conjugated Enynes. Angew Chem Int Ed Engl 2021; 60:16989-16993. [PMID: 34062038 DOI: 10.1002/anie.202106566] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Indexed: 12/11/2022]
Abstract
Asymmetric hydrogenation is one of the most powerful methods for the preparation of single enantiomer compounds. However, the chemo- and enantioselective hydrogenation of the relatively inert unsaturated group in substrates possessing multiple unsaturated bonds remains a challenge. We herein report a protocol for the highly chemo- and enantioselective hydrogenation of conjugated enynes while keeping the alkynyl bond intact. Mechanism studies indicate that the accompanying Zn2+ generated from zinc reduction of the CoII complex plays a critical role to initiate a plausible CoI /CoIII catalytic cycle. This approach allows for the highly efficient generation of chiral propargylamines (up to 99.9 % ee and 2000 S/C) and further useful chemical transformations.
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Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Zhenfeng Zhang
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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7
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Hu Y, Zhang Z, Liu Y, Zhang W. Cobalt‐Catalyzed Chemo‐ and Enantioselective Hydrogenation of Conjugated Enynes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontier Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Zhenfeng Zhang
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontier Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontier Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
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8
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Li B, Liu D, Hu Y, Chen J, Zhang Z, Zhang W. Nickel‐Catalyzed Asymmetric Hydrogenation of Hydrazones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100642] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Bowen Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Dan Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Jianzhong Chen
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Zhenfeng Zhang
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 R. China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 R. China
- College of Chemistry Zhengzhou University 75 Daxue Road Zhengzhou 450052 P. R. China
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9
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Du X, Xiao Y, Yang Y, Duan Y, Li F, Hu Q, Chung LW, Chen G, Zhang X. Enantioselective Hydrogenation of Tetrasubstituted α,β‐Unsaturated Carboxylic Acids Enabled by Cobalt(II) Catalysis: Scope and Mechanistic Insights. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016705] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiaoyong Du
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Ye Xiao
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Yuhong Yang
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Ya‐Nan Duan
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Fangfang Li
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Qi Hu
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Lung Wa Chung
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Gen‐Qiang Chen
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
- Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518000 China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
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10
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Du X, Xiao Y, Yang Y, Duan Y, Li F, Hu Q, Chung LW, Chen G, Zhang X. Enantioselective Hydrogenation of Tetrasubstituted α,β‐Unsaturated Carboxylic Acids Enabled by Cobalt(II) Catalysis: Scope and Mechanistic Insights. Angew Chem Int Ed Engl 2021; 60:11384-11390. [DOI: 10.1002/anie.202016705] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Indexed: 01/04/2023]
Affiliation(s)
- Xiaoyong Du
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Ye Xiao
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Yuhong Yang
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Ya‐Nan Duan
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Fangfang Li
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Qi Hu
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Lung Wa Chung
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
| | - Gen‐Qiang Chen
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
- Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518000 China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518000 China
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11
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Da Concepción E, Fernández I, Mascareñas JL, López F. Highly Enantioselective Cobalt-Catalyzed (3+2) Cycloadditions of Alkynylidenecyclopropanes. Angew Chem Int Ed Engl 2021; 60:8182-8188. [PMID: 33464693 DOI: 10.1002/anie.202015202] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/20/2020] [Indexed: 11/10/2022]
Abstract
Low-valent cobalt complexes equipped with chiral ligands can efficiently promote highly enantioselective (3+2) cycloadditions of alkyne-tethered alkylidenecyclopropanes. The annulation allows to assemble bicyclic systems containing five-membered rings in good yields and with excellent enantiomeric ratios. We also present a mechanistic discussion based on experimental and computational data, which support the involvement of CoI /CoIII catalytic cycles.
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Affiliation(s)
- Eduardo Da Concepción
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - José L Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Fernando López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.,Misión Biológica de Galicia, Consejo Superior de Investigaciones Científicas (CSIC), 36080, Pontevedra, Spain
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12
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Da Concepción E, Fernández I, Mascareñas JL, López F. Highly Enantioselective Cobalt‐Catalyzed (3+2) Cycloadditions of Alkynylidenecyclopropanes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015202] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Eduardo Da Concepción
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Facultad de Ciencias Químicas Universidad Complutense de Madrid 28040 Madrid Spain
| | - José L. Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Fernando López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
- Misión Biológica de Galicia Consejo Superior de Investigaciones Científicas (CSIC) 36080 Pontevedra Spain
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13
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Blasius CK, Vasilenko V, Matveeva R, Wadepohl H, Gade LH. Reaction Pathways and Redox States in α-Selective Cobalt-Catalyzed Hydroborations of Alkynes. Angew Chem Int Ed Engl 2020; 59:23010-23014. [PMID: 32889757 PMCID: PMC7756293 DOI: 10.1002/anie.202009625] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/04/2020] [Indexed: 11/19/2022]
Abstract
Cobalt(II) alkyl complexes supported by a monoanionic NNN pincer ligand are pre‐catalysts for the regioselective hydroboration of terminal alkynes, yielding the Markovnikov products with α:β‐(E) ratios of up to 97:3. A cobalt(II) hydride and a cobalt(II) vinyl complex appear to determine the main reaction pathway. In a background reaction the highly reactive hydrido species specifically converts to a coordinatively unsaturated cobalt(I) complex which was found to re‐enter the main catalytic cycle.
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Affiliation(s)
- Clemens K Blasius
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Vladislav Vasilenko
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Regina Matveeva
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Lutz H Gade
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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14
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Reaction Pathways and Redox States in α‐Selective Cobalt‐Catalyzed Hydroborations of Alkynes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009625] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Whyte A, Bajohr J, Torelli A, Lautens M. Enantioselective Cobalt-Catalyzed Intermolecular Hydroacylation of 1,6-Enynes. Angew Chem Int Ed Engl 2020; 59:16409-16413. [PMID: 32524694 DOI: 10.1002/anie.202006716] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/02/2020] [Indexed: 12/20/2022]
Abstract
We report a cobalt-catalyzed hydroacylation of 1,6-enynes with exogenous aldehydes in a domino sequence to construct enantioenriched ketones. The products were obtained in good yields with excellent regio-, diastereo-, and enantioselectivity. Furthermore, the chiral products served as valuable precursors to access complex spirocyclic scaffolds with three contiguous stereocenters. The asymmetric hydroacylation process exhibited no C-H crossover and no KIE, thus indicating that the C-H bond cleavage was not involved in the turnover-limiting step.
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Affiliation(s)
- Andrew Whyte
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Jonathan Bajohr
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Alexa Torelli
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Mark Lautens
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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16
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Whyte A, Bajohr J, Torelli A, Lautens M. Enantioselective Cobalt‐Catalyzed Intermolecular Hydroacylation of 1,6‐Enynes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrew Whyte
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Jonathan Bajohr
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Alexa Torelli
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Mark Lautens
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
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17
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MacNeil CS, Mendelsohn LN, Zhong H, Pabst TP, Chirik PJ. Synthesis and Reactivity of Organometallic Intermediates Relevant to Cobalt-Catalyzed Hydroformylation. Angew Chem Int Ed Engl 2020; 59:8912-8916. [PMID: 32182395 DOI: 10.1002/anie.202001677] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Indexed: 01/28/2023]
Abstract
Intermediates relevant to cobalt-catalyzed alkene hydroformylation have been isolated and evaluated in fundamental organometallic transformations relevant to aldehyde formation. The 18-electron (R,R)-(iPr DuPhos)Co(CO)2 H has been structurally characterized, and it promotes exclusive hydrogenation of styrene in the presence of 50 bar of H2 /CO gas (1:1) at 100 °C. Deuterium-labeling studies established reversible 2,1-insertion of styrene into the Co-D bond of (R,R)-(iPr DuPhos)Co(CO)2 D. Whereas rapid β-hydrogen elimination from cobalt alkyls occurred under an N2 atmosphere, alkylation of (R,R)-(iPr DuPhos)Co(CO)2 Cl in the presence of CO enabled the interception of (R,R)-(iPr DuPhos)Co(CO)2 C(O)CH2 CH2 Ph, which upon hydrogenolysis under 4 atm H2 produced the corresponding aldehyde and cobalt hydride, demonstrating the feasibility of elementary steps in hydroformylation. Both the hydride and chloride derivatives, (X=H- , Cl- ), underwent exchange with free 13 CO. Under reduced pressure, (R,R)-(iPr DuPhos)Co(CO)2 Cl underwent CO dissociation to form (R,R)-(iPr DuPhos)Co(CO)Cl.
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Affiliation(s)
- Connor S MacNeil
- Department of Chemistry, Princeton University, Frick Laboratory 292, Princeton, NJ, 08544, USA
| | - Lauren N Mendelsohn
- Department of Chemistry, Princeton University, Frick Laboratory 292, Princeton, NJ, 08544, USA
| | - Hongyu Zhong
- Department of Chemistry, Princeton University, Frick Laboratory 292, Princeton, NJ, 08544, USA
| | - Tyler P Pabst
- Department of Chemistry, Princeton University, Frick Laboratory 292, Princeton, NJ, 08544, USA
| | - Paul J Chirik
- Department of Chemistry, Princeton University, Frick Laboratory 292, Princeton, NJ, 08544, USA
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18
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MacNeil CS, Mendelsohn LN, Zhong H, Pabst TP, Chirik PJ. Synthesis and Reactivity of Organometallic Intermediates Relevant to Cobalt‐Catalyzed Hydroformylation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001677] [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)
- Connor S. MacNeil
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
| | - Lauren N. Mendelsohn
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
| | - Hongyu Zhong
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
| | - Tyler P. Pabst
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
| | - Paul J. Chirik
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
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19
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Boyd TM, Tegner BE, Tizzard GJ, Martínez‐Martínez AJ, Neale SE, Hayward MA, Coles SJ, Macgregor SA, Weller AS. A Structurally Characterized Cobalt(I) σ-Alkane Complex. Angew Chem Int Ed Engl 2020; 59:6177-6181. [PMID: 31943626 PMCID: PMC7187152 DOI: 10.1002/anie.201914940] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Indexed: 11/11/2022]
Abstract
A cobalt σ-alkane complex, [Co(Cy2 P(CH2 )4 PCy2 )(norbornane)][BArF 4 ], was synthesized by a single-crystal to single-crystal solid/gas hydrogenation from a norbornadiene precursor, and its structure was determined by X-ray crystallography. Magnetic data show this complex to be a triplet. Periodic DFT and electronic structure analyses revealed weak C-H→Co σ-interactions, augmented by dispersive stabilization between the alkane ligand and the anion microenvironment. The calculations are most consistent with a η1 :η1 -alkane binding mode.
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Affiliation(s)
- Timothy M. Boyd
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of OxfordOxfordOX1 3TAUK
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | - Bengt E. Tegner
- Institute of Chemical SciencesHeriot-Watt UniversityEdinburghEH14 4ASUK
| | - Graham J. Tizzard
- UK National Crystallography ServiceChemistryFaculty of Engineering and Physical SciencesUniversity of SouthamptonSouthamptonSO17 1BJUK
| | | | - Samuel E. Neale
- Institute of Chemical SciencesHeriot-Watt UniversityEdinburghEH14 4ASUK
| | - Michael A. Hayward
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of OxfordOxfordOX1 3TAUK
| | - Simon J. Coles
- UK National Crystallography ServiceChemistryFaculty of Engineering and Physical SciencesUniversity of SouthamptonSouthamptonSO17 1BJUK
| | | | - Andrew S. Weller
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of OxfordOxfordOX1 3TAUK
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
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20
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Hu Y, Chen J, Li B, Zhang Z, Gridnev ID, Zhang W. Nickel‐Catalyzed Asymmetric Hydrogenation of 2‐Amidoacrylates. Angew Chem Int Ed Engl 2020; 59:5371-5375. [DOI: 10.1002/anie.201916534] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Yawen Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of PharmacyShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Jianzhong Chen
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Bowen Li
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Zhenfeng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of PharmacyShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Ilya D. Gridnev
- Department of ChemistryGraduate School of ScienceTohoku University Aramaki 3-6, Aoba-ku Sendai 980-8578 Japan
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of PharmacyShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
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21
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Mukaiyama‐Preis: M. D. Burke und S. Matsunaga / Ryoji‐Noyori‐Preis und Paracelsus‐Preis: S. E. Denmark / Henry J. Albert‐Preis: M. P. Doyle / ORCS‐Preise: P. Chirik und J. J. Spivey / FNP‐Preis: M. Drąg. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Mukaiyama Award: M. D. Burke und S. Matsunaga / Ryoji Noyori Prize and Paracelsus Prize: S. E. Denmark / Henry J. Albert Award: M. P. Doyle / ORCS Awards: P. Chirik und J. J. Spivey / FNP Award: M. Drąg. Angew Chem Int Ed Engl 2020; 59:3365-3366. [DOI: 10.1002/anie.202000882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Boyd TM, Tegner BE, Tizzard GJ, Martínez‐Martínez AJ, Neale SE, Hayward MA, Coles SJ, Macgregor SA, Weller AS. A Structurally Characterized Cobalt(I) σ‐Alkane Complex. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914940] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Timothy M. Boyd
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of Oxford Oxford OX1 3TA UK
- Department of ChemistryUniversity of York York YO10 5DD UK
| | - Bengt E. Tegner
- Institute of Chemical SciencesHeriot-Watt University Edinburgh EH14 4AS UK
| | - Graham J. Tizzard
- UK National Crystallography ServiceChemistryFaculty of Engineering and Physical SciencesUniversity of Southampton Southampton SO17 1BJ UK
| | | | - Samuel E. Neale
- Institute of Chemical SciencesHeriot-Watt University Edinburgh EH14 4AS UK
| | - Michael A. Hayward
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of Oxford Oxford OX1 3TA UK
| | - Simon J. Coles
- UK National Crystallography ServiceChemistryFaculty of Engineering and Physical SciencesUniversity of Southampton Southampton SO17 1BJ UK
| | | | - Andrew S. Weller
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of Oxford Oxford OX1 3TA UK
- Department of ChemistryUniversity of York York YO10 5DD UK
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24
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Hu Y, Chen J, Li B, Zhang Z, Gridnev ID, Zhang W. Nickel‐Catalyzed Asymmetric Hydrogenation of 2‐Amidoacrylates. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916534] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yawen Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of PharmacyShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Jianzhong Chen
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Bowen Li
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Zhenfeng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of PharmacyShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Ilya D. Gridnev
- Department of ChemistryGraduate School of ScienceTohoku University Aramaki 3-6, Aoba-ku Sendai 980-8578 Japan
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of PharmacyShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
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25
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Hu Y, Zhang Z, Zhang J, Liu Y, Gridnev ID, Zhang W. Cobalt‐Catalyzed Asymmetric Hydrogenation of C=N Bonds Enabled by Assisted Coordination and Nonbonding Interactions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909928] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Zhenfeng Zhang
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Jian Zhang
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Ilya D. Gridnev
- Department of Chemistry Graduate School of Science Tohoku University Aramaki 3–6, Aoba-ku Sendai 980-8578 Japan
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
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26
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Hu Y, Zhang Z, Zhang J, Liu Y, Gridnev ID, Zhang W. Cobalt-Catalyzed Asymmetric Hydrogenation of C=N Bonds Enabled by Assisted Coordination and Nonbonding Interactions. Angew Chem Int Ed Engl 2019; 58:15767-15771. [PMID: 31464078 DOI: 10.1002/anie.201909928] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Indexed: 12/29/2022]
Abstract
An efficient cobalt-catalyzed asymmetric hydrogenation of C=N bonds has been realized. Chiral hydrazines were obtained in high yields and with excellent enantioselectivities (95-98 % ee). The hydrogenation went smoothly at up to 2000 substrate/catalyst and on a gram scale. The success of this reaction relies on the presence of an NHBz group in the substrates, with the reactivity and enantioselectivity improved by an assisted coordination to the cobalt atom and a nonbonding interaction with the ligand. Furthermore, this reaction has practical applications for the synthesis of several useful chiral nitrogen-containing compounds.
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Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Zhenfeng Zhang
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Jian Zhang
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Ilya D Gridnev
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki 3-6, Aoba-ku, Sendai, 980-8578, Japan
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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