1
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Yisimayili N, Lu CD. Stereoselective Construction of Less-Accessible Acyclic α,α-Disubstituted β-Ketiminonitriles via Electrophilic Cyanation of β,β-Disubstituted Enesulfinamides. Org Lett 2024; 26:4371-4376. [PMID: 38752686 DOI: 10.1021/acs.orglett.4c01409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
The metalloenamines, formed by NH-deprotonation of β,β-disubstituted enesulfinamides, can undergo reactions with commercially available electrophilic cyanating reagents such as tosyl cyanide (TsCN) or 3-oxo-1,2-benziodoxole-1(3H)-carbonitrile (CBX). Through the utilization of appropriate stereoisomers of enesulfinamides, this method enables the selective synthesis of any of the four stereoisomers of α,α-disubstituted β-sulfinylimino nitriles, which feature acyclic quaternary stereocenters and are typically more challenging to synthesize. These compounds can then undergo stereoselective nucleophilic addition, leading to the creation of valuable enantioenriched multisubstituted β-amino carbonyl surrogates with a high degree of structural diversity.
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Affiliation(s)
| | - Chong-Dao Lu
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
- School of Health, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
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2
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Lee H, Nam H, Lee SY. Enantio- and Diastereoselective Variations on α-Iminonitriles: Harnessing Chiral Cyclopropenimine-Thiourea Organocatalysts. J Am Chem Soc 2024; 146:3065-3074. [PMID: 38281151 DOI: 10.1021/jacs.3c09911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Chiral 1-pyrrolines containing a nitrile motif serve as crucial structural scaffolds in biologically active molecules and exhibit diversity as building blocks owing to their valuable functional groups; however, the asymmetric synthesis of such compounds remains largely unexplored. Herein, we present an enantio- and diastereoselective method for the synthesis of α-chiral nitrile-containing 1-pyrroline derivatives bearing vicinal stereocenters through the design and introduction of chiral cyclopropenimine-based bifunctional catalysts featuring a thiourea moiety. This synthesis entails a highly stereoselective conjugate addition of α-iminonitriles to a wide array of enones, followed by cyclocondensation, thereby affording a series of cyanopyrroline derivatives, some of which contain all-carbon quaternary centers. Moreover, we demonstrate the synthetic utility of this strategy by performing a gram-scale reaction with 1% catalyst loading, along with a variety of chemoselective transformations of the product, including the synthesis of a vildagliptin analogue. Finally, we showcase the selective synthesis of all four stereoisomers of the cyanopyrroline products through trans-to-cis isomerization, highlighting the versatility of our approach.
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Affiliation(s)
- Hooseung Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Hyeongwoo Nam
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Sarah Yunmi Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
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3
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Sun M, Wei L, Li C. Regio- and Enantioselective Allylic Cyanomethylation by Synergistic Rhodium and Silane Catalysis. J Am Chem Soc 2023; 145:3897-3902. [PMID: 36752690 DOI: 10.1021/jacs.3c00244] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Rh/silane-cocatalyzed regio- and enantioselctive allylic cyanomethylation with inert acetonitrile directly has been developed. Addition of a catalytic amount neutral silane reagent as an acetonitrile anion carrier is essential for the success of this reaction. The synthesis of mono- and bis-allylation products can be switched by adjusting the size of substituents on the silane, ligands, and temperature. Chiral homoallylic nitriles could be synthesized in above 20:1 branch/linear ratio, up to 98% yield and >99% ee.
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Affiliation(s)
- 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, 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, 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, China
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4
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Zhao L, Yan Y, Wei ZL, Liao WW. Organocatalytic Allylic Alkylation of α-(Alkylideneamino)nitriles and Its Application in the Preparation of Multisubstituted 1-Pyrrolines. J Org Chem 2022; 87:10090-10104. [PMID: 35816383 DOI: 10.1021/acs.joc.2c01072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A synthetic approach for the construction of functionalized diverse 1-pyrrolines incorporating β-quaternary carbon centers under mild reaction conditions has been reported, in which α-allyl α-(alkylideneamino)nitriles generated from a Lewis base-catalyzed allylic alkylation reaction engaged in a Lewis base-mediated tandem intramolecular cyclization to deliver the targeted molecules in a catalytically atom-economic fashion.
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Affiliation(s)
- Lang Zhao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Yan Yan
- State Key Lab of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Zhong-Lin Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Wei-Wei Liao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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5
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Xie J, Guo Z, Liu W, Zhang D, He Y, Yang X. Kinetic Resolution of 1,
2‐Diamines
via Organocatalyzed Asymmetric Electrophilic Aminations of Anilines. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200125] [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)
- Jinglei Xie
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University Fushun 113001 China
| | - Zheng Guo
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wei Liu
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
| | - Dekun Zhang
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
| | - Yu‐Peng He
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University Fushun 113001 China
- State Key Laboratory of Fine Chemicals, Ningbo Institute of Dalian University of Technology, Ningbo 315016 China
| | - Xiaoyu Yang
- School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 China
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6
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Multicomponent double Mannich alkylamination involving C(sp2)–H and benzylic C(sp3)–H bonds. Nat Commun 2022; 13:435. [PMID: 35064111 PMCID: PMC8782832 DOI: 10.1038/s41467-022-28088-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 12/13/2021] [Indexed: 11/29/2022] Open
Abstract
Alkylamines are ubiquitous in pharmaceuticals, materials and agrochemicals. The Mannich reaction is a well-known three-component reaction for preparing alkylamines and has been widely used in academic research and industry. However, the nucleophilic components in this process rely on C(sp2)−H and activated C(sp3)−H bonds while the unactivated C(sp3)−H bonds involved Mannich alkylamination is a long-standing challenge. Here, we report an unprecedented multicomponent double Mannich alkylamination for both C(sp2)−H and unactivated benzylic C(sp3)−H bonds. In this process, various 3-alkylbenzofurans, formaldehyde and alkylamine hydrochlorides assemble efficiently to furnish benzofuran-fused piperidines. Mechanistic studies and density functional theory (DFT) calculations revealed a distinctive pathway that a multiple Mannich reaction and retro-Mannich reaction of benzofuran and dehydrogenation of benzylic C(sp3)−H bonds were key steps to constitute the alkylamination. This protocol furnishes a Mannich alkylamine synthesis from unusual C–H inputs to access benzofuran-fused piperidines with exceptional structural diversity, molecular complexity and drug-likeness. Therefore, this work opens a distinctive vision for the alkylamination of unactivated C(sp3)−H bonds, and provides a powerful tool in diversity-oriented synthesis (DOS) and drug discovery. The Mannich reaction is a three-component reaction for preparing alkylamines, but the nucleophilic components rely on C(sp2)−H and activated C(sp3)−H bonds. Here, the authors report an unprecedented multicomponent double Mannich alkylamination for both C(sp2)−H and unactivated benzylic C(sp3)−H bonds.
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7
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Zhou P, Shao X, Malcolmson SJ. A Diastereodivergent and Enantioselective Approach to syn- and anti-Diamines: Development of 2-Azatrienes for Cu-Catalyzed Reductive Couplings with Imines That Furnish Allylic Amines. J Am Chem Soc 2021; 143:13999-14008. [PMID: 34424694 DOI: 10.1021/jacs.1c07707] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We introduce a new reagent class, 2-azatrienes, as a platform for catalytic enantioselective synthesis of allylic amines. Herein, we demonstrate their promise by a diastereodivergent synthesis of syn- and anti-1,2-diamines through their Cu-bis(phosphine)-catalyzed reductive couplings with imines. With Ph-BPE as the supporting ligand, anti-diamines are obtained (up to 91% yield, >20:1 dr, and >99:1 er), and with the rarely utilized t-Bu-BDPP, syn-diamines are generated (up to 76% yield, 1:>20 dr, and 97:3 er).
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Affiliation(s)
- Pengfei Zhou
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Xinxin Shao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 310036, P. R. China
| | - Steven J Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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8
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Pan HJ, Lin Y, Gao T, Lau KK, Feng W, Yang B, Zhao Y. Catalytic Diastereo- and Enantioconvergent Synthesis of Vicinal Diamines from Diols through Borrowing Hydrogen. Angew Chem Int Ed Engl 2021; 60:18599-18604. [PMID: 34125475 DOI: 10.1002/anie.202101517] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 06/13/2021] [Indexed: 01/23/2023]
Abstract
We present herein an unprecedented diastereoconvergent synthesis of vicinal diamines from diols through an economical, redox-neutral process. Under cooperative ruthenium and Lewis acid catalysis, readily available anilines and 1,2-diols (as a mixture of diastereomers) couple to forge two C-N bonds in an efficient and diastereoselective fashion. By identifying an effective chiral iridium/phosphoric acid co-catalyzed procedure, the first enantioconvergent double amination of racemic 1,2-diols has also been achieved, resulting in a practical access to highly valuable enantioenriched vicinal diamines.
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Affiliation(s)
- Hui-Jie Pan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Yamei Lin
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore.,School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Taotao Gao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Kai Kiat Lau
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Wei Feng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Binmiao Yang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Yu Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, China
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9
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Pan H, Lin Y, Gao T, Lau KK, Feng W, Yang B, Zhao Y. Catalytic Diastereo‐ and Enantioconvergent Synthesis of Vicinal Diamines from Diols through Borrowing Hydrogen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101517] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Hui‐Jie Pan
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Yamei Lin
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
- School of Food Science and Pharmaceutical Engineering Nanjing Normal University 1 Wenyuan Road Nanjing 210023 P. R. China
| | - Taotao Gao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Kai Kiat Lau
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Wei Feng
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Binmiao Yang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Yu Zhao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City, Fuzhou 350207 China
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10
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Xu C, Reep C, Jarvis J, Naumann B, Captain B, Takenaka N. Asymmetric Catalytic Ketimine Mannich Reactions and Related Transformations. Catalysts 2021; 11:712. [PMID: 34745653 PMCID: PMC8570560 DOI: 10.3390/catal11060712] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The catalytic enantioselective ketimine Mannich and its related reactions provide direct access to chiral building blocks bearing an α-tertiary amine stereogenic center, a ubiquitous structural motif in nature. Although ketimines are often viewed as challenging electrophiles, various approaches/strategies to circumvent or overcome the adverse properties of ketimines have been developed for these transformations. This review showcases the selected examples that highlight the benefits and utilities of various ketimines and remaining challenges associated with them in the context of Mannich, allylation, and aza-Morita-Baylis-Hillman reactions as well as their variants.
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Affiliation(s)
- Changgong Xu
- Chemistry Program, Department of Biomedical and Chemical Engineering and Sciences, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901-6975, USA
| | - Carlyn Reep
- Chemistry Program, Department of Biomedical and Chemical Engineering and Sciences, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901-6975, USA
| | - Jamielyn Jarvis
- Chemistry Program, Department of Biomedical and Chemical Engineering and Sciences, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901-6975, USA
| | - Brandon Naumann
- Chemistry Program, Department of Biomedical and Chemical Engineering and Sciences, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901-6975, USA
| | - Burjor Captain
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, FL 33146-0431, USA
| | - Norito Takenaka
- Chemistry Program, Department of Biomedical and Chemical Engineering and Sciences, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901-6975, USA
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11
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Homma C, Takeshima A, Kano T, Maruoka K. Construction of chiral α- tert-amine scaffolds via amine-catalyzed asymmetric Mannich reactions of alkyl-substituted ketimines. Chem Sci 2020; 12:1445-1450. [PMID: 34163907 PMCID: PMC8179053 DOI: 10.1039/d0sc05269h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Stereoselective Mannich reactions of aldehydes with ketimines provide chiral β-amino aldehydes that bear an α-tert-amine moiety. However, the structural variation of the ketimines is limited due to the formation of inseparable E/Z isomers, low reactivity, and other synthetic difficulties. In this study, a highly diastereodivergent synthesis of hitherto difficult-to-access β-amino aldehydes that bear a chiral α-tert-amine moiety was achieved using the amine-catalyzed Mannich reactions of aldehydes with less-activated Z-ketimines that bear both alkyl and alkynyl groups.
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Affiliation(s)
- Chihiro Homma
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo Kyoto 606-8502 Japan
| | - Aika Takeshima
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo Kyoto 606-8502 Japan
| | - Taichi Kano
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Graduate School of Science, Graduate School of Pharmaceutical Sciences, Kyoto University Kyoto 606-8502 Japan .,School of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 China
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12
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Synthesis of chiral anti-1,2-diamine derivatives through copper(I)-catalyzed asymmetric α-addition of ketimines to aldimines. Nat Commun 2020; 11:4473. [PMID: 32901034 PMCID: PMC7479099 DOI: 10.1038/s41467-020-18235-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 08/11/2020] [Indexed: 11/29/2022] Open
Abstract
Chiral 1,2-diamines serve as not only common structure units in bioactive molecules but also useful ligands for a range of catalytic asymmetric reactions. Here, we report a method to access anti-1,2-diamine derivatives. By means of the electron-withdrawing nature of 2- or 4-nitro-phenyl group, a copper(I)-catalyzed asymmetric α-addition of ketimines derived from trifluoroacetophenone and 2- or 4-NO2-benzylamines to aldimines is achieved, which affords a series of chiral anti-1,2-diamine derivatives in moderate to high yields with moderate to high diastereoselectivity and high to excellent enantioselectivity. Aromatic aldimines, heteroaromatic aldimines, and aliphatic aldimines serve as suitable substrates. The nitro group is demonstrated as a synthetical handle by several transformations, including a particularly interesting Fe(acac)3-catalyzed radical hydroamination with a trisubstituted olefin. Moreover, the aryl amine moiety obtained by the reduction of the nitro group serves as a synthetically versatile group, which leads to the generation of several functional groups by the powerful Sandmeyer reaction, such as -OH, -Br, -CF3, and -BPin. Chiral 1,2-diamines are useful chemicals used as ligands in asymmetric catalysis. Here, the authors report a copper(I)-catalyzed asymmetric α-addition of ketimines derived from trifluoroacetophenone and 2- or 4-NO2-benzylamines to aldimines, affording a series of chiral anti-1,2-diamine derivatives.
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13
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Zhu WR, Liu K, Weng J, Huang WH, Huang WJ, Chen Q, Lin N, Lu G. Catalytic Asymmetric Synthesis of Vicinal Tetrasubstituted Diamines via Umpolung Cross-Mannich Reaction of Cyclic Ketimines. Org Lett 2020; 22:5014-5019. [DOI: 10.1021/acs.orglett.0c01578] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Wen-Run Zhu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Kai Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Wei-Hua Huang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Wei-Jie Huang
- College of Pharmacy, Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Qing Chen
- College of Pharmacy, Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Ning Lin
- College of Pharmacy, Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
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14
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Nakamura A, Kuwano S, Sun J, Araseki K, Ogino E, Arai T. Chiral Dinuclear Benzyliminobinaphthoxy‐Palladium Catalyst for Asymmetric Mannich Reaction of Aldimines and Isatin‐Derived Ketimines with Alkylmalononitriles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000447] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ayu Nakamura
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of ScienceChiba University1-33 Yayoi, Inage Chiba 263-8522 Japan
| | - Satoru Kuwano
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of ScienceChiba University1-33 Yayoi, Inage Chiba 263-8522 Japan
| | - Junchuan Sun
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of ScienceChiba University1-33 Yayoi, Inage Chiba 263-8522 Japan
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing 100081 People's Republic of China
| | - Kensuke Araseki
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of ScienceChiba University1-33 Yayoi, Inage Chiba 263-8522 Japan
| | - Eri Ogino
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of ScienceChiba University1-33 Yayoi, Inage Chiba 263-8522 Japan
| | - Takayoshi Arai
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of ScienceChiba University1-33 Yayoi, Inage Chiba 263-8522 Japan
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15
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Fayssal SA, Giungi A, Berhal F, Prestat G. Iron-Catalyzed Intra-intermolecular Aminoazidation of Alkenes. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00400] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Sandra Abi Fayssal
- Université de Paris, UMR CNRS 8601, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, 45 rue des Saints-Pères, F-75006 Paris, France
| | - Alessandro Giungi
- Université de Paris, UMR CNRS 8601, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, 45 rue des Saints-Pères, F-75006 Paris, France
| | - Farouk Berhal
- Université de Paris, UMR CNRS 8601, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, 45 rue des Saints-Pères, F-75006 Paris, France
| | - Guillaume Prestat
- Université de Paris, UMR CNRS 8601, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, 45 rue des Saints-Pères, F-75006 Paris, France
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16
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Guan H, Cao X, Walsh PJ, Mao J. One-Pot Aminoalkylation of Aldehydes: Diastereoselective Synthesis of Vicinal Diamines with Azaarylmethylamines. Org Lett 2019; 21:8679-8683. [DOI: 10.1021/acs.orglett.9b03287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Haixing Guan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Xianzhong Cao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Jianyou Mao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China
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17
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Kim J, Shin M, Cho SH. Copper-Catalyzed Diastereoselective and Enantioselective Addition of 1,1-Diborylalkanes to Cyclic Ketimines and α-Imino Esters. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02931] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jeongho Kim
- Department of Chemistry, POSTECH, 37673, Pohang, Korea
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18
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Malcolmson SJ, Li K, Shao X. 2-Azadienes as Enamine Umpolung Synthons for the Preparation of Chiral Amines. Synlett 2019; 30:1253-1268. [PMID: 33731976 PMCID: PMC7963344 DOI: 10.1055/s-0037-1611770] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The development of new strategies for the preparation of chiral amines is an important objective in organic synthesis. In this Synpacts, we summarize our approach for catalytically accessing nucleophilic aminoalkyl metal species from 2-azadienes, and its application in generating a number of important but elusive chiral amine scaffolds. Reductive couplings with ketones and imines afford 1,2-amino tertiary alcohols and 1,2-diamines, respectively, whereas fluoroarylations of gem-difluoro-2-azadienes deliver α-trifluoromethylated benzylic amines.
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Affiliation(s)
| | - Kangnan Li
- Department of Chemistry, Duke University, NC 27708, USA
| | - Xinxin Shao
- Department of Chemistry, Duke University, NC 27708, USA
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19
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Ichikawa S, Dai XJ, Buchwald SL. Regio- and Enantioselective Synthesis of 1,2-Diamine Derivatives by Copper-Catalyzed Hydroamination. Org Lett 2019; 21:4370-4373. [PMID: 31099584 DOI: 10.1021/acs.orglett.9b01592] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A highly regio- and enantioselective synthesis of 1,2-diamine derivatives from γ-substituted allylic pivalamides using copper-catalyzed hydroamination is reported. The N-pivaloyl group is essential, in both facilitating the hydrocupration step and suppressing an unproductive β-elimination from the alkylcopper intermediate. This approach enables an efficient construction of chiral differentially protected vicinal diamines under mild conditions with broad functional group tolerance.
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Affiliation(s)
- Saki Ichikawa
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Xi-Jie Dai
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Stephen L Buchwald
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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20
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Ding R, De los Santos ZA, Wolf C. Catalytic Asymmetric Mannich Reaction of α-Fluoronitriles with Ketimines: Enantioselective and Diastereodivergent Construction of Vicinal Tetrasubstituted Stereocenters. ACS Catal 2019; 9:2169-2176. [PMID: 30956891 DOI: 10.1021/acscatal.8b05164] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Diastereodivergent and enantioselective conversion of isatin ketimines to α-fluoro-β-aminonitriles with vicinal tetrasubstituted stereocenters is achieved by a chiral copper complex/guanidine base catalyzed Mannich reaction with proper choice of the bisphosphine ligand. The reaction is broad in scope, scalable, and provides efficient access to a series of 3-aminoindolinones exhibiting a quaternary carbon-fluorine stereocenter with high yields and stereoselectivities. Selective transformations of the Mannich reaction products into multifunctional 3-aminooxindoles without erosion of enantiomeric and diastereomeric purity highlight the synthetic utility.
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Affiliation(s)
- Ransheng Ding
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, District of Columbia 20057, United States
| | - Zeus A. De los Santos
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, District of Columbia 20057, United States
| | - Christian Wolf
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, District of Columbia 20057, United States
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21
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Hu XS, Ding PG, Yu JS, Zhou J. A Sc(OTf)3 catalyzed Mukaiyama–Mannich reaction of difluoroenoxysilanes with unactivated ketimines. Org Chem Front 2019. [DOI: 10.1039/c9qo00577c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first example of a Mukaiyama–Mannich reaction of difluoroenoxysilanes with unactivated ketimines catalyzed by Sc(OTf)3 is described.
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Affiliation(s)
- Xiao-Si Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Pei-Gang Ding
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
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22
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Bissember AC, Gardiner MG, Wierenga TS. α-Cyanocarbanion complexes and their application in synthesis. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.04.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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23
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Shao X, Li K, Malcolmson SJ. Enantioselective Synthesis of anti-1,2-Diamines by Cu-Catalyzed Reductive Couplings of Azadienes with Aldimines and Ketimines. J Am Chem Soc 2018; 140:7083-7087. [PMID: 29775301 PMCID: PMC5999589 DOI: 10.1021/jacs.8b04750] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Here we report highly efficient and chemoselective azadiene-imine reductive couplings catalyzed by (Ph-BPE)Cu-H that afford anti-1,2-diamines. In all cases, reactions take place with either aldimine or ketimine electrophiles to deliver a single diastereomer of product in >95:5 er. The products' diamines are easily differentiable, facilitating downstream synthesis.
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Affiliation(s)
- Xinxin Shao
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Kangnan Li
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J. Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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24
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Zheng WF, Sun GJ, Chen L, Kang Q. Enantioselective Synthesis of trans
-Vicinal Diamines via
Rhodium-Catalyzed [2+2] Cycloaddition of Allenamides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800021] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Wei-Feng Zheng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
| | - Gui-Jun Sun
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
| | - Liang Chen
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
| | - Qiang Kang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou, 350002 People's Republic of China
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25
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Arai T, Sato K, Nakamura A, Makino H, Masu H. Dinuclear PhosphoiminoBINOL-Pd Container for Malononitrile: Catalytic Asymmetric Double Mannich Reaction for Chiral 1,3-Diamine Synthesis. Sci Rep 2018; 8:837. [PMID: 29339816 PMCID: PMC5770441 DOI: 10.1038/s41598-018-19178-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 12/22/2017] [Indexed: 11/16/2022] Open
Abstract
A phosphoiminoBINOL ligand was designed to form a dinuclear metal complex that could hold a malononitrile molecule. The dinuclear bis(phosphoimino)binaphthoxy-Pd2(OAc)2 complex catalyzed a double Mannich reaction of N-Boc-imines with malononitrile to give chiral 1,3-diamines with high enantioselectivity. The rational asymmetric catalyst, which smoothly introduces the first coupling product to the second coupling reaction while avoiding the reverse reaction, facilitates the over-reaction into a productive reaction process.
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Affiliation(s)
- Takayoshi Arai
- Soft Molecular Activation Research Center (SMARC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan. .,Molecular Chirality Research Center (MCRC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan. .,Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.
| | - Katsuya Sato
- Soft Molecular Activation Research Center (SMARC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.,Molecular Chirality Research Center (MCRC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.,Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
| | - Ayu Nakamura
- Soft Molecular Activation Research Center (SMARC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.,Molecular Chirality Research Center (MCRC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.,Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
| | - Hiroki Makino
- Soft Molecular Activation Research Center (SMARC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.,Molecular Chirality Research Center (MCRC), Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.,Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
| | - Hyuma Masu
- Center for Analytical Instrumentation, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
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26
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Kano T, Aota Y, Maruoka K. Asymmetric Synthesis of Less Accessible α-Tertiary Amines from Alkynyl Z-Ketimines. Angew Chem Int Ed Engl 2017; 56:16293-16296. [PMID: 29110376 DOI: 10.1002/anie.201710084] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 11/05/2022]
Abstract
A highly stereoselective synthesis of hitherto less accessible chiral α-tertiary amines with multiple structurally similar linear carbon chains was achieved through chiral auxiliary mediated addition of organolithium reagents to the geometrically well-controlled alkynyl Z-ketimines. This stereoselective nucleophilic addition offers a general approach to the asymmetric synthesis of nitrogen-containing chiral materials.
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Affiliation(s)
- Taichi Kano
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Yusuke Aota
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
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27
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Hatano M, Mochizuki T, Nishikawa K, Ishihara K. Enantioselective Aza-Friedel–Crafts Reaction of Indoles with Ketimines Catalyzed by Chiral Potassium Binaphthyldisulfonates. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03708] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manabu Hatano
- Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa, Nagoya 464-8603, Japan
| | - Takuya Mochizuki
- Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa, Nagoya 464-8603, Japan
| | - Keisuke Nishikawa
- Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa, Nagoya 464-8603, Japan
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28
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Kano T, Aota Y, Maruoka K. Asymmetric Synthesis of Less Accessible α-Tertiary Amines from Alkynyl Z-
Ketimines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710084] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Taichi Kano
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
| | - Yusuke Aota
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
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29
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Hajra S, Bhosale SS, Hazra A. An asymmetric acetate-Mannich reaction of chiral isatin derived ketimines and its applications. Org Biomol Chem 2017; 15:9217-9225. [PMID: 29082414 DOI: 10.1039/c7ob02407j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient TMSOTf-mediated asymmetric acetate-Mannich reaction of isatin derived tert-butylsulfinyl ketimines and S-phenyl thioacetate was developed to afford the direct synthesis of indole-based β3,3-amino acid thioester with excellent selectivity (dr > 98 : 2). Syntheses of (+)-AG-041R and 3-aminopyrroloindoline have been accomplished utilizing the developed method.
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Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India.
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30
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Li K, Weber AE, Tseng L, Malcolmson SJ. Diastereoselective and Enantiospecific Synthesis of 1,3-Diamines via 2-Azaallyl Anion Benzylic Ring-Opening of Aziridines. Org Lett 2017; 19:4239-4242. [DOI: 10.1021/acs.orglett.7b01886] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Kangnan Li
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Alexandria E. Weber
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Luke Tseng
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J. Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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31
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Kondo M, Saito H, Nakamura S. Direct catalytic enantioselective Mannich-type reaction of α,α-dithioacetonitriles with imines using chiral bis(imidazoline)–Pd complexes. Chem Commun (Camb) 2017; 53:6776-6779. [DOI: 10.1039/c7cc03307a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first highly enantioselective reaction of α,α-dithioacetonitriles with imines has been developed.
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Affiliation(s)
- Masaru Kondo
- Department of Life Science and Applied Chemistry
- Graduate School of Engineering
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
| | - Hikari Saito
- Department of Life Science and Applied Chemistry
- Graduate School of Engineering
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
| | - Shuichi Nakamura
- Department of Life Science and Applied Chemistry
- Graduate School of Engineering
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
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32
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Affiliation(s)
- Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Motomu Kanai
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroaki Sasai
- The
Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
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33
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Lin S, Kumagai N, Shibasaki M. Direct Catalytic Asymmetric Mannich-type Reaction of α,β-Unsaturated γ-Butyrolactam with Ketimines. Chemistry 2016; 22:3296-3299. [DOI: 10.1002/chem.201600034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Shaoquan Lin
- Institute of Microbial Chemistry (BIKAKEN), Tokyo; 3-14-23 Kamiosaki, Shinagawa-ku Tokyo 141-0021 Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN), Tokyo; 3-14-23 Kamiosaki, Shinagawa-ku Tokyo 141-0021 Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), Tokyo; 3-14-23 Kamiosaki, Shinagawa-ku Tokyo 141-0021 Japan
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34
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Lin S, Kumagai N, Shibasaki M. Enantioselective synthesis of α,α-disubstituted α-amino acids via direct catalytic asymmetric addition of acetonitrile to α-iminoesters. Org Biomol Chem 2016; 14:9725-9730. [DOI: 10.1039/c6ob01874b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral N-heterocyclic carbene complexes of [Ir(cod)(OMe)]2 in combination with Barton's base enabled direct enantioselective addition of acetonitrile to α-iminoesters.
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Affiliation(s)
- Shaoquan Lin
- Institute of Microbial Chemistry (BIKAKEN)
- Tokyo
- Tokyo 141-0021
- Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN)
- Tokyo
- Tokyo 141-0021
- Japan
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35
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de la Campa R, Gammack Yamagata AD, Ortín I, Franchino A, Thompson AL, Odell B, Dixon DJ. Catalytic enantio- and diastereoselective Mannich reaction of α-substituted isocyanoacetates and ketimines. Chem Commun (Camb) 2016; 52:10632-5. [DOI: 10.1039/c6cc04132a] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The highly diastereo- and enantioselective Mannich reaction/cyclisation of α-substituted isocyanoacetates and ketimines catalysed by silver acetate and a cinchona-derived amino phosphine is reported.
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Affiliation(s)
- Raquel de la Campa
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | | | - Irene Ortín
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Allegra Franchino
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Amber L. Thompson
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Barbara Odell
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Darren J. Dixon
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
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36
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López R, Palomo C. Cyanoalkylation: Alkylnitriles in Catalytic CC Bond‐Forming Reactions. Angew Chem Int Ed Engl 2015; 54:13170-84. [DOI: 10.1002/anie.201502493] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/17/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Rosa López
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco (UPV‐EHU), Apdo. 1022, 20080 San Sebastián (Spain)
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco (UPV‐EHU), Apdo. 1022, 20080 San Sebastián (Spain)
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37
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López R, Palomo C. Cyanoalkylierung: Alkylnitrile in katalytischen C‐C‐Kupplungen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502493] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rosa López
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco (UPV‐EHU), Apdo. 1022, 20080 San Sebastián (Spanien)
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco (UPV‐EHU), Apdo. 1022, 20080 San Sebastián (Spanien)
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38
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Takada H, Kumagai N, Shibasaki M. Stereoselective Total Synthesis of KAE609 via Direct Catalytic Asymmetric Alkynylation to Ketimine. Org Lett 2015; 17:4762-5. [DOI: 10.1021/acs.orglett.5b02300] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hisashi Takada
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
- JST, ACT-C, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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39
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Arai T, Moribatake T, Masu H. Chiral Bis(imidazolidine)-Derived NCN Pincer Rh Complex for Catalytic Asymmetric Mannich Reaction of Malononitrile withN-Boc Imines. Chemistry 2015; 21:10671-5. [DOI: 10.1002/chem.201502097] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Indexed: 12/16/2022]
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40
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Kondo M, Nishi T, Hatanaka T, Funahashi Y, Nakamura S. Catalytic Enantioselective Reaction of α-Aminoacetonitriles Using Chiral Bis(imidazoline) Palladium Catalysts. Angew Chem Int Ed Engl 2015; 54:8198-202. [DOI: 10.1002/anie.201503098] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Indexed: 11/09/2022]
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41
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Kondo M, Nishi T, Hatanaka T, Funahashi Y, Nakamura S. Catalytic Enantioselective Reaction of α-Aminoacetonitriles Using Chiral Bis(imidazoline) Palladium Catalysts. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503098] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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