1
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Yao M, Dong S, Xu X. Asymmetric Carbene Transformations for the Construction of All-Carbon Quaternary Centers. Chemistry 2024; 30:e202304299. [PMID: 38366703 DOI: 10.1002/chem.202304299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/26/2024] [Accepted: 02/14/2024] [Indexed: 02/18/2024]
Abstract
Asymmetric catalytic carbene reactions have been well documented in the last few decades for the expeditious assembly of chiral molecules with structural diversity. However, the enantioselective construction of all-carbon quaternary centers remains a challenge in this area. In this review article, two types of asymmetric carbene reactions that beyond cyclopropanation, cyclopropenation, and Büchner reaction, have been summarized for the construction of all-carbon quaternary centers: 1) using carbene species as a 1C synthon that reacts with a trisubstituted prochiral center; 2) sequential installation of two different C-C bonds on the carbene position, which features a gem-difunctionalization reaction. Especially, the asymmetric metal carbene gem-dialkylation process, which has emerged as a practical and versatile method for the expeditious assembly of complex architectures from readily available chemical resources, is a complementary approach for the expeditious assembly of all-carbon quaternary centers.
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Affiliation(s)
- Minghan Yao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shanliang Dong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Xinfang Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
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2
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Ayesha, Ashraf A, Arshad M, Sajid N, Rasool N, Abbas M, Nazeer U, Khalid M, Imran M. Dinuclear Zn-Catalytic System as Brønsted Base and Lewis Acid for Enantioselectivity in Same Chiral Environment. ACS OMEGA 2024; 9:6074-6092. [PMID: 38375498 PMCID: PMC10876046 DOI: 10.1021/acsomega.3c07446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 02/21/2024]
Abstract
Zinc (Zn) is a crucial element with remarkable significance in organic transformations. The profusion of harmless zinc salts in the Earth's outer layer qualifies zinc as a noteworthy contender for inexpensive and eco-friendly reagents and catalysts. Recently, widely recognized uses of organo-Zn compounds in the field of organic synthesis have undergone extensive expansion toward asymmetric transformations. The ProPhenol ligand, a member of the chiral nitrogenous-crown family, exhibits the spontaneous formation of a dual-metal complex when reacted with alkyl metal (R-M) reagents, e.g., ZnEt2. The afforded Zn complex possesses two active sites, one Lewis acid and the other Brønsted base, thereby facilitating the activation of nucleophiles and electrophiles simultaneously within the same chiral pocket. In this comprehensive analysis, we provide a thorough account of the advancement and synthetic potential of these diverse catalysts in organic synthesis, while emphasizing the reactivity and selectivities, i.e., dr and ee due to the design/structure of the ligands employed.
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Affiliation(s)
- Ayesha
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Aisha Ashraf
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mahwish Arshad
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Numan Sajid
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Nasir Rasool
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mujahad Abbas
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Usman Nazeer
- Chemistry
Department, University of Houston, 3585 Cullen Boulvard, Houston, Texas 77204-5003, United States
| | | | - Muhammad Imran
- Chemistry
Department, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
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3
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Zhao Y, Li S, Fan Y, Cao J, Dong X, Wang R, Tian L. C sp3-H Imination Using Arylazo Sulfone as a N Source: An Approach to Access Imines. Org Lett 2023; 25:5911-5915. [PMID: 37530586 DOI: 10.1021/acs.orglett.3c02283] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
An unprecedented Csp3-H imination reaction using arylazo sulfones as the readily accessible and stable N source is reported. The synthetic virtues are demonstrated through mild conditions, simple operation, good air compatibility, and functional group tolerance, as well as suitability for gram-scale reaction. The resulting imines can be further converted to α-amino acids. The presented results shed light on an unusual usage of arylazo sulfones and will inspire novel experimental design by using arylazo sulfones as the N source.
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Affiliation(s)
- Yulei Zhao
- Key Laboratory of Life-Organic Analysis of Shandong Province, Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Universities of Shandong Province, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City, Shandong Province 273165, P. R. China
| | - Shuai Li
- Key Laboratory of Life-Organic Analysis of Shandong Province, Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Universities of Shandong Province, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City, Shandong Province 273165, P. R. China
| | - Yuhang Fan
- Key Laboratory of Life-Organic Analysis of Shandong Province, Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Universities of Shandong Province, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City, Shandong Province 273165, P. R. China
| | - Jun Cao
- Key Laboratory of Life-Organic Analysis of Shandong Province, Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Universities of Shandong Province, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City, Shandong Province 273165, P. R. China
| | - Xiaotong Dong
- Key Laboratory of Life-Organic Analysis of Shandong Province, Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Universities of Shandong Province, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City, Shandong Province 273165, P. R. China
| | - Ruiqing Wang
- Key Laboratory of Life-Organic Analysis of Shandong Province, Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Universities of Shandong Province, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City, Shandong Province 273165, P. R. China
| | - Laijin Tian
- Key Laboratory of Life-Organic Analysis of Shandong Province, Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Universities of Shandong Province, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City, Shandong Province 273165, P. R. China
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4
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Wamser N, Wu H, Buono F, Brundage A, Ricci F, Lorenz JC, Wang J, Haddad N, Paolillo J, Leung JC, Lee H, Hossain A. Discovery and Process Development of a Scalable Biocatalytic Kinetic Resolution toward Synthesis of a Sterically Hindered Chiral Ketone. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicole Wamser
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Hao Wu
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Frederic Buono
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Anthony Brundage
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Francesco Ricci
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Jon C. Lorenz
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Jun Wang
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Nizar Haddad
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Joshua Paolillo
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Joyce C. Leung
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Heewon Lee
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Azad Hossain
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
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5
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Li ZF, Zhu CL, Zhang Y, Yao Y, Lu CD. Construction of Acyclic Quaternary Stereocenters via Mannich-Type Addition of α,α-Disubstituted N- tert-Butanesulfinyl Ketimines to Isatin-Derived Ketimines. Org Lett 2022; 24:2883-2888. [PMID: 35420435 DOI: 10.1021/acs.orglett.2c00888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A Mannich reaction of deprotonated, highly enantioenriched α,α-disubstituted N-tert-butanesulfinyl ketimines with isatin-derived ketimines was developed to prepare 3-amino-3-substituted oxindoles bearing an acyclic quaternary stereogenic carbon substituted with two sterically similar groups. The excellent stereocontrol of the deprotonation enabled the formation of metalloenamine intermediates with stereodefined geometry, while the precise facial selectivity of the C-C bond formation allowed the construction of contiguous quaternary and tetrasubstituted stereocenters with excellent stereoselectivity.
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Affiliation(s)
- Zheng-Fei Li
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Chong-Lin Zhu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Yun Zhang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Yun Yao
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Chong-Dao Lu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, 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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Wang J, He F, Yang X. Asymmetric construction of acyclic quaternary stereocenters via direct enantioselective additions of α-alkynyl ketones to allenamides. Nat Commun 2021; 12:6700. [PMID: 34795297 PMCID: PMC8602376 DOI: 10.1038/s41467-021-27028-7] [Citation(s) in RCA: 13] [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: 01/19/2021] [Accepted: 10/26/2021] [Indexed: 12/11/2022] Open
Abstract
Acyclic quaternary stereocenters are widely present in a series of biologically active natural products and pharmaceuticals. However, development of highly efficient asymmetric catalytic methods for the construction of these privileged motifs represents a longstanding challenge in organic synthesis. Herein, an efficient chiral phosphoric acid catalyzed direct asymmetric addition of α-alkynyl acyclic ketones with allenamides has been developed, furnishing the acyclic all-carbon quaternary stereocenters with excellent regioselectivities and high enantioselectivities. Extensive and detailed experimental mechanistic studies were performed to investigate the mechanism of this reaction. Despite a novel covalent allyl phosphate intermediate was found in these reactions, further studies indicated that a SN2-type mechanism with the ketone nucleophiles is not very possible. Instead, a more plausible mechanism involving the elimination of the allyl phosphate to give the α,β-unsaturated iminium intermediate, which underwent the asymmetric conjugate addition with the enol form of ketone nucleophiles under chiral anion catalysis, was proposed. In virtue of the fruitful functional groups bearing in the chiral products, the diverse derivatizations of the chiral products provided access to a wide array of chiral scaffolds with quaternary stereocenters.
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Affiliation(s)
- Jiawen Wang
- School of Physical Science and Technology, ShanghaiTech University, 201210, Shanghai, China
| | - Faqian He
- School of Physical Science and Technology, ShanghaiTech University, 201210, Shanghai, China
| | - Xiaoyu Yang
- School of Physical Science and Technology, ShanghaiTech University, 201210, Shanghai, China.
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8
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Fu Y, Zhao X, Chen D, Luo J, Huang S. Cu-catalyzed coupling of indanone oxime acetates with thiols to 2,3-difunctionalized indenones. Chem Commun (Camb) 2021; 57:10719-10722. [PMID: 34581714 DOI: 10.1039/d1cc04167c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A Cu-catalyzed coupling reaction of indanone oxime acetates with thiols has been developed for the synthesis of 2,3-functionalized 1-indenones. This protocol has several features including easy mild reaction conditions, stabilized enamine products, good tolerance of functional groups, and no external oxidants. This reaction enables direct derivatization on the indanone ring to provide valuable functionalized indenones at room temperature.
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Affiliation(s)
- Yuanyuan Fu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.
| | - Xueyan Zhao
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.
| | - Dengfeng Chen
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.
| | - Jinyue Luo
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.
| | - Shenlin Huang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.
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9
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10
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Shamna S, Afsina CMA, Philip RM, Anilkumar G. Recent advances and prospects in the Zn-catalysed Mannich reaction. RSC Adv 2021; 11:9098-9111. [PMID: 35423453 PMCID: PMC8695403 DOI: 10.1039/d0ra10772g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 02/15/2021] [Indexed: 12/27/2022] Open
Abstract
Zn-catalysed reactions are ubiquitously important due to their inexpensive, generally less toxic and atom-economic nature. According to the modern criteria of sustainability, their use in a catalytic manner is a highly desirable goal, especially when using chiral ligands. Considering the relevance of well-established zinc-mediated C-C bond formation reactions, it is relatively surprising that the use of Zn as a catalyst is still underdeveloped, especially in comparison with other transition metals. The vast majority of natural molecules, including proteins, nucleic acids and most biologically active compounds, contain nitrogen. Consequently, developing new synthetic methods for the construction of nitrogenous molecules receives great attention from organic chemists. The Mannich reaction is a very basic and very useful platform for the development of several such nitrogen-containing molecules. In this review, we summarise the recent advancements in the Zn-catalysed Mannich reaction, covering the literature from 2011 to 2020.
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Affiliation(s)
- Salahudeen Shamna
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills Kottayam Kerala 686560 India +91-481-273-1036
| | - C M A Afsina
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills Kottayam Kerala 686560 India +91-481-273-1036
| | - Rose Mary Philip
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills Kottayam Kerala 686560 India +91-481-273-1036
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills Kottayam Kerala 686560 India +91-481-273-1036
- Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala 686560 India
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11
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Geng Y, Hua Y, Jia S, Wang M. Direct Asymmetric α‐Selective Mannich Reaction of β,γ‐Unsaturated Ketones with Cyclic α‐Imino Ester: Divergent Synthesis of Cyclocanaline and Tetrahydro Pyridazinone Derivatives. Chemistry 2021; 27:5130-5135. [DOI: 10.1002/chem.202100284] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Indexed: 12/16/2022]
Affiliation(s)
- Yu‐Huan Geng
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
| | - Yuan‐Zhao Hua
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
| | - Shi‐Kun Jia
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
| | - Min‐Can Wang
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
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12
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Bifunctional C2-symmetric ionic liquid-supported (S)-proline as a recyclable organocatalyst for Mannich reactions in neat condition. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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13
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Trost BM, Zhu C. Zn-ProPhenol Catalyzed Enantioselective Mannich Reaction of 2 H-Azirines with Alkynyl Ketones. Org Lett 2020; 22:9683-9687. [PMID: 33269592 DOI: 10.1021/acs.orglett.0c03737] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The enantioselective Mannich reaction of 2H-azirines with alkynyl ketones is achieved under Zn-ProPhenol catalysis, delivering various aziridines with vicinal tetrasubstituted stereocenters in high yields with excellent enantioselectivities. The bimetallic Zn-ProPhenol complexes activate both the nucleophile and the electrophile in the same chiral pocket. A unique intramolecular hydrogen bond is observed in the obtained Mannich adducts, which lowers the basicity of the product's aziridine nitrogen thus favoring enantioselective control and allowing catalyst turnover.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Chuanle Zhu
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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14
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Yi Y, Hua YZ, Lu HJ, Liu LT, Wang MC. Brønsted Base and Lewis Acid Cooperatively Catalyzed Asymmetric exo'-Selective [3 + 2] Cycloaddition of Trifluoromethylated Azomethine Ylides and Methyleneindolinones. Org Lett 2020; 22:2527-2531. [PMID: 32202432 DOI: 10.1021/acs.orglett.0c00283] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A Brønsted base and Lewis acid cooperatively catalyzed 1,3-dipolar cycloaddition is reported through chiral dinuclear zinc catalysts. An asymmetric exo'-selective [3 + 2] cycloaddition of CF3-containing N-unprotected isatin-derived azomethine ylides is realized. In the presence of 10 mol % of catalyst, azomethine ylides react efficiently with methyleneindolinones, giving a series of trifluoromethyl-substituted 2,3-pyrrolidinyl dispirooxindoles with highly enantio- (up to 99% ee) and exo'-selectivity (>20:1 dr). Up to four contiguous stereogenic centers, including two adjacent spiro quaternary stereocenters, are constructed in one step.
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Affiliation(s)
- Yang Yi
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
| | - Yuan-Zhao Hua
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
| | - Hui-Jie Lu
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
| | - Lan-Tao Liu
- School of Chemistry & Chemical Engineering, Shangqiu Normal University, Shangqiu City, Henan Province 476000, P. R. China
| | - Min-Can Wang
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
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15
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Trost BM, Hung C(J, Mata G. Zweikernige Metall‐ProPhenol‐Katalysatoren: Entwicklung und Anwendungen in der Synthese. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201909692] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Barry M. Trost
- Department of ChemistryStanford University 333 Campus Drive Stanford CA 94305 USA
| | - Chao‐I (Joey) Hung
- Department of ChemistryStanford University 333 Campus Drive Stanford CA 94305 USA
| | - Guillaume Mata
- Department of ChemistryStanford University 333 Campus Drive Stanford CA 94305 USA
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16
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Trost BM, Gnanamani E. Enantio- and Diastereoselective Double Mannich Reaction between Ketones and Imines Catalyzed by Zn-ProPhenol. Org Lett 2020; 22:1675-1680. [DOI: 10.1021/acs.orglett.0c00318] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Elumalai Gnanamani
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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17
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Trost BM, Hung C(J, Mata G. Dinuclear Metal‐ProPhenol Catalysts: Development and Synthetic Applications. Angew Chem Int Ed Engl 2019; 59:4240-4261. [DOI: 10.1002/anie.201909692] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Barry M. Trost
- Department of ChemistryStanford University 333 Campus Drive Stanford CA 94305 USA
| | - Chao‐I (Joey) Hung
- Department of ChemistryStanford University 333 Campus Drive Stanford CA 94305 USA
| | - Guillaume Mata
- Department of ChemistryStanford University 333 Campus Drive Stanford CA 94305 USA
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18
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Teng J, Sun S, Yu JT, Cheng J. Copper-Catalyzed Cascade Denitrogenative Transannulation/Hydrolyzation of 3-Aminoindazoles toward 2,2-Disubstituted Indanones. J Org Chem 2019; 84:15669-15676. [DOI: 10.1021/acs.joc.9b02303] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jiangang Teng
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China
| | - Song Sun
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China
| | - Jiang Cheng
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China
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19
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Abstract
In this study, a set of enantiomerically pure aziridines bearing a phosphine oxide moiety were prepared in high yields and tested as chiral catalysts in the direct asymmetric Mannich reaction of hydroxyacetone, an amine (p-anisidine), and various aromatic aldehydes. The appropriate Mannich adducts were formed in chemical yields from moderate to good with a high level of enantio- and diastereoselectivity. The best results were obtained using the catalysts bearing a free NH-aziridine subunit.
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20
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Trost BM, Hung CIJ, Jiao Z. Enantioselective Divergent Syntheses of (+)-Bulleyanaline and Related Isoquinoline Alkaloids from the Genus Corydalis. J Am Chem Soc 2019; 141:16085-16092. [PMID: 31525040 DOI: 10.1021/jacs.9b08441] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The isoquinoline alkaloids isolated from the genus Corydalis possess potent and diverse biological activities. Herein, a concise, divergent, and enantioselective route to access these natural products is disclosed. Key transformations of our approach include a challenging Zn-ProPhenol-catalyzed asymmetric Mannich reaction to build a quaternary stereogenic center and a rapid cationic Au-catalyzed cycloisomerization to the common structural skeleton of these natural products. Subsequent late-stage oxidations and modifications allow efficient access to the targeted alkaloids. Overall, seven natural products have been successfully synthesized in 6 to 10 steps from readily available starting materials, including (+)-corynoline, (+)-anhydrocorynoline, (+)-12-hydroxycorynoline, (+)-12-hydroxycorynoloxine, (+)-corynoloxine, (+)-6-acetonylcorynoline, and (+)-bulleyanaline.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry , Stanford University , Stanford , California 94305-5580 , United States
| | - Chao-I Joey Hung
- Department of Chemistry , Stanford University , Stanford , California 94305-5580 , United States
| | - Zhiwei Jiao
- Department of Chemistry , Stanford University , Stanford , California 94305-5580 , United States
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21
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Reddy KN, Rao MVK, Sridhar B, Subba Reddy BV. BINOL Phosphoric Acid‐Catalyzed Asymmetric Mannich Reaction of Cyclic
N
‐Acyl Ketimines with Cyclic Enones. Chem Asian J 2019; 14:2958-2965. [DOI: 10.1002/asia.201900556] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 06/22/2019] [Indexed: 12/29/2022]
Affiliation(s)
- K. Nagarjuna Reddy
- Fluoro & AgrochemicalsCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110025 India
| | - M. V. Krishna Rao
- Fluoro & AgrochemicalsCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110025 India
| | - B. Sridhar
- Laboratory of X-ray CrystallographyCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
| | - B. V. Subba Reddy
- Fluoro & AgrochemicalsCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
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22
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Development of bifunctional organocatalysts and application to asymmetric total synthesis of naucleofficine I and II. Nat Commun 2019; 10:3394. [PMID: 31358765 PMCID: PMC6662887 DOI: 10.1038/s41467-019-11382-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/11/2019] [Indexed: 01/07/2023] Open
Abstract
The proline-type organocatalysts has been efficiently employed to catalyze a wide range of asymmetric transformations; however, there are still many synthetically useful and challenging transformations that remain unachievable in an asymmetric fashion. Herein, a chiral bifunctional organocatalyst with a spirocyclic pyrrolidine backbone-derived containing fluoro-alkyl and aryl sulfonamide functionalities, are designed, prepared, and examined in the asymmetric Mannich/acylation/Wittig reaction sequence of 3,4-dihydro-β-carboline with acetaldehyde, acyl halides, and Wittig reagents. As a result, the spirocyclic pyrrolidine trifluoromethanesulfonamide catalyst can facilitate this versatile sequence as demonstrated by 18 examples displaying excellent enantioselectivity (up to 94% ee), as well as moderate to good yields (up to 54% over 3 steps). As a practical application, the asymmetric total synthesis of naucleofficine I (1a) and II (1b) in ten steps have been accomplished. Natural products often contain complex N-fused polycyclic structures with multiple substituents and stereocentres. Here, the authors developed a bifunctional organocatalyst that is instrumental in obtaining such structures and applied it to the total synthesis of naucleofficine I and II in 6 steps.
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23
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Zhou NN, Ning SS, Tong XJ, Luo TT, Yang J, Li LQ, Fan MJ, Yang DS, Zhu HT. Brønsted-Acid-Catalyzed Synthesis of 3-Alkoxy and 3-Sulfamido Indanones via a Tandem Cyclization. J Org Chem 2019; 84:8497-8508. [DOI: 10.1021/acs.joc.9b00791] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ni-Ni Zhou
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Si-Si Ning
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Xiao-Juan Tong
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ting-Ting Luo
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Jin Yang
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Lin-Qiang Li
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ming-Jin Fan
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - De-Suo Yang
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Hai-Tao Zhu
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
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24
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Ravi Kumar G, Ramesh B, Yarlagadda S, Sridhar B, Reddy BVS. Organocatalytic Enantioselective Mannich Reaction: Direct Access to Chiral β-Amino Esters. ACS OMEGA 2019; 4:2168-2177. [PMID: 31459463 PMCID: PMC6648529 DOI: 10.1021/acsomega.8b02132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 01/11/2019] [Indexed: 06/10/2023]
Abstract
An asymmetric Mannich reaction has been developed to generate chiral β-amino esters in good yields with excellent enantiomeric excesses (ee, up to 99%) using a chiral bifunctional thiourea catalyst derived from (R,R)-cyclohexyldiamine. This is the first report on the addition of 3-indolinone-2-carboxylates to N-Boc-benzaldimines generated in situ from α-amidosulfones, which proceeds under mild conditions.
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Affiliation(s)
- G. Ravi Kumar
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Boora Ramesh
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Suresh Yarlagadda
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Balasubramanian Sridhar
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - B. V. Subba Reddy
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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25
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Trost BM, Hung CIJ, Gnanamani E. Tuning the Reactivity of Ketones through Unsaturation: Construction of Cyclic and Acyclic Quaternary Stereocenters via Zn-ProPhenol Catalyzed Mannich Reactions. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04685] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Chao-I Joey Hung
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Elumalai Gnanamani
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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26
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Wei H, Bao M, Dong K, Qiu L, Wu B, Hu W, Xu X. Enantioselective Oxidative Cyclization/Mannich Addition Enabled by Gold(I)/Chiral Phosphoric Acid Cooperative Catalysis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201812140] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Hanlin Wei
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Ming Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Kuiyong Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Bing Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Wenhao Hu
- School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
- School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
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27
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Wei H, Bao M, Dong K, Qiu L, Wu B, Hu W, Xu X. Enantioselective Oxidative Cyclization/Mannich Addition Enabled by Gold(I)/Chiral Phosphoric Acid Cooperative Catalysis. Angew Chem Int Ed Engl 2018; 57:17200-17204. [DOI: 10.1002/anie.201812140] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Indexed: 01/11/2023]
Affiliation(s)
- Hanlin Wei
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Ming Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Kuiyong Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Bing Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Wenhao Hu
- School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
- School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
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28
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Sahani RL, Patil MD, Wagh SB, Liu RS. Catalytic Transformations of Alkynes into either α-Alkoxy or α-Aryl Enolates: Mannich Reactions by Cooperative Catalysis and Evidence for Nucleophile-Directed Chemoselectivity. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806883] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rajkumar Lalji Sahani
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Manoj D. Patil
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Sachin Bhausaheb Wagh
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Rai-Shung Liu
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
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29
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Sahani RL, Patil MD, Wagh SB, Liu RS. Catalytic Transformations of Alkynes into either α-Alkoxy or α-Aryl Enolates: Mannich Reactions by Cooperative Catalysis and Evidence for Nucleophile-Directed Chemoselectivity. Angew Chem Int Ed Engl 2018; 57:14878-14882. [DOI: 10.1002/anie.201806883] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/12/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Rajkumar Lalji Sahani
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Manoj D. Patil
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Sachin Bhausaheb Wagh
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
| | - Rai-Shung Liu
- Frontier Research Center for Matter Science and Technology; Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
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30
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Zhu XY, Lv MH, Zhao YN, Lan LY, Li WZ, Xiao LJ. Organocatalytic sulfa-Michael/aldol cascade: constructing functionalized 2,5-dihydrothiophenes bearing a quaternary carbon stereocenter. RSC Adv 2018; 8:34000-34003. [PMID: 35548804 PMCID: PMC9086683 DOI: 10.1039/c8ra04325f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 09/24/2018] [Indexed: 11/25/2022] Open
Abstract
A practical sulfa-Michael/aldol cascade reaction of 1,4-dithiane-2,5-diol and α-aryl-β-nitroacrylates has been developed, which allows efficient access to functionalized 2,5-dihydrothiophenes bearing a quaternary carbon stereocenter in moderate to good yields with high enantioselectivities.
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Affiliation(s)
- Xiao-Yu Zhu
- College of Applied Chemistry, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Mei-Heng Lv
- College of Applied Chemistry, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Ya-Nan Zhao
- College of Applied Chemistry, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Li-Yan Lan
- College of Applied Chemistry, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Wen-Ze Li
- College of Applied Chemistry, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Lin-Jiu Xiao
- College of Applied Chemistry, Shenyang University of Chemical Technology Shenyang 110142 China
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31
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Shang M, Chan JZ, Cao M, Chang Y, Wang Q, Cook B, Torker S, Wasa M. C-H Functionalization of Amines via Alkene-Derived Nucleophiles through Cooperative Action of Chiral and Achiral Lewis Acid Catalysts: Applications in Enantioselective Synthesis. J Am Chem Soc 2018; 140:10593-10601. [PMID: 30045617 DOI: 10.1021/jacs.8b06699] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Catalytic transformations of α-amino C-H bonds to afford valuable enantiomerically enriched α-substituted amines, entities that are prevalent in pharmaceuticals and bioactive natural products, have been developed. Typically, such processes are carried out under oxidative conditions and require precious metal-based catalysts. Here, we disclose a strategy for an enantioselective union of N-alkylamines and α,β-unsaturated compounds, performed under redox-neutral conditions, and promoted through concerted action of seemingly competitive Lewis acids, B(C6F5)3, and a chiral Mg-PyBOX complex. Thus, a wide variety of β-amino carbonyl compounds may be synthesized, with complete atom economy, through stereoselective reaction of an in situ-generated enantiomerically enriched Mg-enolate and an appropriate electrophile.
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Affiliation(s)
- Ming Shang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Jessica Z Chan
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Min Cao
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Yejin Chang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Qifan Wang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Brennan Cook
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Masayuki Wasa
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
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32
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Trost BM, Hung C(J, Scharf MJ. Direct Catalytic Asymmetric Vinylogous Additions of α,β‐ and β,γ‐Butenolides to Polyfluorinated Alkynyl Ketimines. Angew Chem Int Ed Engl 2018; 57:11408-11412. [DOI: 10.1002/anie.201806249] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| | | | - Manuel J. Scharf
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
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33
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Trost BM, Hung C(J, Scharf MJ. Direct Catalytic Asymmetric Vinylogous Additions of α,β‐ and β,γ‐Butenolides to Polyfluorinated Alkynyl Ketimines. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806249] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| | | | - Manuel J. Scharf
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
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34
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Tafida UI, Uzairu A, Abechi SE. Mechanism and rate constant of proline-catalysed asymmetric aldol reaction of acetone and p-nitrobenzaldehyde in solution medium: Density-functional theory computation. J Adv Res 2018; 12:11-19. [PMID: 30013799 PMCID: PMC6045567 DOI: 10.1016/j.jare.2018.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 03/01/2018] [Accepted: 03/03/2018] [Indexed: 12/26/2022] Open
Abstract
In search of new ways to improve catalyst design, the current research focused on using quantum mechanical descriptors to investigate the effect of proline as a catalyst for mechanism and rate of asymmetric aldol reaction. A plausible mechanism of reaction between acetone and 4-nitrobenzaldehyde in acetone medium was developed using highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies calculated via density functional theory (DFT) at the 6-31G∗/B3LYP level of theory. New mechanistic steps were proposed and found to follow, with expansion, the previously reported iminium-enamine route of typical class 1 aldolase enzymes. From the elementary steps, the first step which involves a bimolecular collision of acetone and proline was considered as the rate-determining step, having the highest activation energy of 59.07 kJ mol-1. The mechanism was used to develop the rate law from which the overall rate constant was calculated and found to be 4.04×10-8dm3mol-1s-1 . The new mechanistic insights and the explicit computation of the rate constant further improve the kinetic knowledge of the reaction.
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Affiliation(s)
- Usman I Tafida
- Department of Chemistry, Faculty of Science, Abubakar Tafawa Balewa University, Bauchi, PMB: 0248 Bauchi, Bauchi State, Nigeria.,Department of Chemistry, Faculty of Science, Ahmadu Bello University, Zaria, PMB: 1044 Zaria, Kaduna State, Nigeria
| | - Adamu Uzairu
- Department of Chemistry, Faculty of Science, Ahmadu Bello University, Zaria, PMB: 1044 Zaria, Kaduna State, Nigeria
| | - Stephen E Abechi
- Department of Chemistry, Faculty of Science, Ahmadu Bello University, Zaria, PMB: 1044 Zaria, Kaduna State, Nigeria
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35
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Branched aldehydes as linchpins for the enantioselective and stereodivergent synthesis of 1,3-aminoalcohols featuring a quaternary stereocentre. Nat Catal 2018. [DOI: 10.1038/s41929-018-0093-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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36
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Trost BM, Tracy JS, Saget T. Direct catalytic enantioselective amination of ketones for the formation of tri- and tetrasubstituted stereocenters. Chem Sci 2018; 9:2975-2980. [PMID: 29719678 PMCID: PMC5897889 DOI: 10.1039/c8sc00147b] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 02/13/2018] [Indexed: 11/21/2022] Open
Abstract
Herein, we report a Zn-ProPhenol catalyzed direct asymmetric amination reaction of unactivated aryl and vinyl ketones using di-tert-butyl azodicarboxylate as a cheap and practical electrophilic nitrogen source. Importantly, this methodology works with both α-branched and unbranched ketones for the construction of tri- and tetrasubstituted N-containing stereocenters. The reaction can be run at gram-scale with low catalyst loadings and features a recoverable and reusable ligand. Finally, the enantioenriched hydrazine products can be readily converted into versatile building blocks such as α-amino carbonyl compounds and β-amino alcohols.
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Affiliation(s)
- B M Trost
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
| | - J S Tracy
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
| | - T Saget
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
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37
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Qin S, Liu S, Cao Y, Li J, Chong C, Liu T, Luo Y, Hu J, Jiang S, Zhou H, Yang G, Yang C. α-Alkylation of Chiral Sulfinimines for Constructing Quaternary Chiral Carbons by Introducing Removable Directing Groups. Org Lett 2018; 20:1350-1354. [PMID: 29446637 DOI: 10.1021/acs.orglett.8b00105] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study developed a facile and efficient synthetic strategy to construct quaternary chiral centers at the α-position of imines and ketones. High regioselectivity and diastereoselectivity were achieved through the synergetic effect of electron-withdrawing directing groups and N-tert-butyl sulfinamide as chiral auxiliaries. Either of them could be removed under the optimized conditions without any epimerization.
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Affiliation(s)
- Shuanglin Qin
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China.,School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Shuangwei Liu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Yuting Cao
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Jiangnan Li
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China.,School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Chuanke Chong
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Tongtong Liu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Yunhao Luo
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Jiyun Hu
- School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Shende Jiang
- School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Honggang Zhou
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Guang Yang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Cheng Yang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
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38
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Zhang ZF, Yang XC, Lu HJ, Wang MC. Enantioselective Direct Synthesis of syn
- and anti
-α,β-Dihydroxy γ-Keto Esters Using a Dinuclear Zinc-AzePhenol Complex. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701695] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Zhao-Fei Zhang
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
| | - Xiao-Chao Yang
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
| | - Hui-Jie Lu
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
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39
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Li Q, Zhou L, Shen XD, Yang KC, Zhang X, Dai QS, Leng HJ, Li QZ, Li JL. Stereoselective Construction of Halogenated Quaternary Carbon Centers by Brønsted Base Catalyzed [4+2] Cycloaddition of α-Haloaldehydes. Angew Chem Int Ed Engl 2018; 57:1913-1917. [DOI: 10.1002/anie.201711813] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/20/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Qiang Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Liang Zhou
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Xu-Dong Shen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Kai-Chuan Yang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Xiang Zhang
- Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; Chengdu 610041 China
| | - Qing-Song Dai
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Hai-Jun Leng
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Qing-Zhu Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Jun-Long Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
- Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; Chengdu 610041 China
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40
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Li Q, Zhou L, Shen XD, Yang KC, Zhang X, Dai QS, Leng HJ, Li QZ, Li JL. Stereoselective Construction of Halogenated Quaternary Carbon Centers by Brønsted Base Catalyzed [4+2] Cycloaddition of α-Haloaldehydes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711813] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qiang Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Liang Zhou
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Xu-Dong Shen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Kai-Chuan Yang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Xiang Zhang
- Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; Chengdu 610041 China
| | - Qing-Song Dai
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Hai-Jun Leng
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Qing-Zhu Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
| | - Jun-Long Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province; Sichuan Industrial Institute of Antibiotics; Chengdu University; Chengdu 610052 China
- Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; Chengdu 610041 China
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41
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Nguyen TN, May JA. Tertiary and Quaternary Carbon Formation via Gallium-Catalyzed Nucleophilic Addition of Organoboronates to Cyclopropanes. Org Lett 2017; 20:112-115. [DOI: 10.1021/acs.orglett.7b03349] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Truong N. Nguyen
- Department of Chemistry, University of Houston, 3585 Cullen Blvd, Fleming Building Rm 112, Houston, Texas 77204-5003, United States
| | - Jeremy A. May
- Department of Chemistry, University of Houston, 3585 Cullen Blvd, Fleming Building Rm 112, Houston, Texas 77204-5003, United States
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42
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You Y, Zhang L, Cui L, Mi X, Luo S. Catalytic Asymmetric Mannich Reaction with N-Carbamoyl Imine Surrogates of Formaldehyde and Glyoxylate. Angew Chem Int Ed Engl 2017; 56:13814-13818. [DOI: 10.1002/anie.201707005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 08/28/2017] [Indexed: 01/07/2023]
Affiliation(s)
- Yang'en You
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100490 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Long Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100490 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Linfeng Cui
- College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Xueling Mi
- College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Sanzhong Luo
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100490 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
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43
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You Y, Zhang L, Cui L, Mi X, Luo S. Catalytic Asymmetric Mannich Reaction with N-Carbamoyl Imine Surrogates of Formaldehyde and Glyoxylate. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yang'en You
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100490 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Long Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100490 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Linfeng Cui
- College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Xueling Mi
- College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Sanzhong Luo
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100490 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
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44
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Shang M, Cao M, Wang Q, Wasa M. Enantioselective Direct Mannich-Type Reactions Catalyzed by Frustrated Lewis Acid/Brønsted Base Complexes. Angew Chem Int Ed Engl 2017; 56:13338-13341. [DOI: 10.1002/anie.201708103] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 08/31/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Ming Shang
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Min Cao
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Qifan Wang
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Masayuki Wasa
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
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45
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Shang M, Cao M, Wang Q, Wasa M. Enantioselective Direct Mannich-Type Reactions Catalyzed by Frustrated Lewis Acid/Brønsted Base Complexes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708103] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ming Shang
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Min Cao
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Qifan Wang
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Masayuki Wasa
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
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46
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Trost BM, Gnanamani E, Hung CIJ. Controlling Regioselectivity in the Enantioselective N-Alkylation of Indole Analogues Catalyzed by Dinuclear Zinc-ProPhenol. Angew Chem Int Ed Engl 2017; 56:10451-10456. [PMID: 28654735 DOI: 10.1002/anie.201705315] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Indexed: 11/07/2022]
Abstract
The enantioselective N-alkylation of indole and its derivatives with aldimines is efficiently catalyzed by a zinc-ProPhenol dinuclear complex under mild conditions to afford N-alkylated indole derivatives in good yield (up to 86 %) and excellent enantiomeric ratio (up to 99.5:0.5 e.r.). This method tolerates a wide array of indoles, as well as pyrrole and carbazole, to afford the corresponding N-alkylation products. The reaction can be run on a gram scale with reduced catalyst loading without impacting the efficiency. The chiral aminals were further elaborated into various chiral polyheterocyclic derivatives. The surprising stability of the chiral N-alkylation products will open new windows for asymmetric catalysis and medicinal chemistry.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
| | - Elumalai Gnanamani
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
| | - Chao-I Joey Hung
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
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47
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Trost BM, Gnanamani E, Hung C(J. Controlling Regioselectivity in the Enantioselective N‐Alkylation of Indole Analogues Catalyzed by Dinuclear Zinc‐ProPhenol. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705315] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
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48
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Ma H, Xie L, Zhang Z, Wu LG, Fu B, Qin Z. Enantioselective Conjugate Addition of 2-Acetyl Azaarenes to β,β-Disubstituted Nitroalkene for the Construction of All-Carbon Quaternary Stereocenters. J Org Chem 2017; 82:7353-7362. [DOI: 10.1021/acs.joc.7b01014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hongli Ma
- Department of Applied
Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Lei Xie
- Department of Applied
Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Zhenhua Zhang
- Department of Applied
Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Lin-gang Wu
- Department of Applied
Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Bin Fu
- Department of Applied
Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Zhaohai Qin
- Department of Applied
Chemistry, China Agricultural University, Beijing 100193, P. R. China
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49
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Trost BM, Saget T, Hung CIJ. Efficient Access to Chiral Trisubstituted Aziridines via Catalytic Enantioselective Aza-Darzens Reactions. Angew Chem Int Ed Engl 2017; 56:2440-2444. [PMID: 28111864 PMCID: PMC5530870 DOI: 10.1002/anie.201607845] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/25/2016] [Indexed: 11/07/2022]
Abstract
Herein, we report a Zn-ProPhenol catalyzed aza-Darzens reaction using chlorinated aromatic ketones as nucleophilic partners for the efficient and enantioselective construction of complex trisubstituted aziridines. The α-chloro-β-aminoketone intermediates featuring a chlorinated tetrasubstituted stereocenter can be isolated in high yields and selectivities for further derivatization. Alternatively, they can be directly transformed to the corresponding aziridines in a one-pot fashion. Of note, the reaction can be run on gram-scale with low catalyst loading without impacting its efficiency. Moreover, this methodology was extended to α-bromoketones which are scarcely used in enantioselective catalysis because of their sensitivity and lack of accessibility.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
| | - Tanguy Saget
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
| | - Chao-I Joey Hung
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
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50
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Trost BM, Saget T, Hung CIJ. Efficient Access to Chiral Trisubstituted Aziridines via Catalytic Enantioselective Aza-Darzens Reactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201607845] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry; Stanford University; Stanford CA 94305-5080 USA
| | - Tanguy Saget
- Department of Chemistry; Stanford University; Stanford CA 94305-5080 USA
| | - Chao-I Joey Hung
- Department of Chemistry; Stanford University; Stanford CA 94305-5080 USA
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