1
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Liu X, Zhu F, Ajitha MJ, Zhang Y, Huang KW, Li D, Wang D. Organocatalyzed Enantioselective [2 + 2] Cycloaddition of C, N-Cyclic Ketimines and Allenoates. Org Lett 2024; 26:225-230. [PMID: 38147459 DOI: 10.1021/acs.orglett.3c03848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
We report a novel enantioselective and regioselective [2 + 2] cycloaddition of allenoate and C,N-cyclic ketimine catalyzed by a quinidine derivative. The methodology enables the synthesis of fused tricyclic azetidines with a quaternary stereogenic center exhibiting high enantioselectivities. The broad range of substrates demonstrates the generality of the protocol, and the resulting functional products can be easily converted to a variety of valuable synthons. To elucidate the plausible reaction mechanism and how the catalyst affects absolute stereocontrol over the products, we conducted the corresponding density functional theory (DFT) calculations.
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Affiliation(s)
- Xinyu Liu
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266100, China
| | - Fangfang Zhu
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266100, China
| | - Manjaly J Ajitha
- KAUST Catalysis Center, Physical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Yunfeng Zhang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266100, China
| | - Kuo-Wei Huang
- KAUST Catalysis Center, Physical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Dehai Li
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266100, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao, Shandong 266237, China
| | - De Wang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266100, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao, Shandong 266237, China
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2
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Recent Advances in Greener Asymmetric Organocatalysis Using Bio-Based Solvents. Catalysts 2023. [DOI: 10.3390/catal13030553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
Abstract
Efficient synthetic methods that avoid the extensive use of hazardous reagents and solvents, as well as harsh reaction conditions, have become paramount in the field of organic synthesis. Organocatalysis is notably one of the best tools in building chemical bonds between carbons and carbon-heteroatoms; however, most examples still employ toxic volatile organic solvents. Although a portfolio of greener solvents is now commercially available, only ethyl alcohol, ethyl acetate, 2-methyltetrahydrofuran, supercritical carbon dioxide, ethyl lactate, and diethyl carbonate have been explored with chiral organocatalysts. In this review, the application of these bio-based solvents in asymmetric organocatalytic methods reported in the last decade is discussed, highlighting the proposed mechanism pathway for the transformations.
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3
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Wang L, Gao F, Zhang X, Peng T, Xu Y, Wang R, Yang D. Concerted Enantioselective [2+2] Cycloaddition Reaction of Imines Mediated by a Magnesium Catalyst. J Am Chem Soc 2023; 145:610-625. [PMID: 36538490 DOI: 10.1021/jacs.2c11284] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Enantioselective [2 + 2] cyclization between an imine and a carbon-carbon double bond is a versatile strategy to build chiral azetidines. However, α-branched allenoates have never been successfully applied in [2 + 2] cyclization reactions with imines, as they always undergo Kwon's [4 + 2] annulation in previous catalytic methods. Herein, a simple in situ generated magnesium catalyst was employed to successfully achieve the enantioselective [2 + 2] cyclization reaction of DPP-imines and α-branched allenoates for the first time. Insightful experiments including KIE experiments, controlled experiments, Hammett plot analysis, and 31P NMR studies of initial intermediates indicate that the current [2 + 2] cyclization of imine most likely involves an asynchronous concerted transition state. Further mechanistic investigations by combining kinetic studies, ESI experiments, 31P NMR studies of coordination complexes, and controlled experiments on reaction rates under different catalyst loading amounts provided the coordination details for this [2 + 2] cyclization reaction between DPP-imines and α-branched allenoates. This new approach was applied to the synthesis of various chiral aza-heterocycles, including the enantioselective synthesis of the key intermediate of a lipid-lowering agent Ezetimibe.
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Affiliation(s)
- Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, P. R. China.,Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou 730000, P. R. China
| | - Feiyun Gao
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, P. R. China.,Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou 730000, P. R. China
| | - Xiaoyong Zhang
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen 518055, P. R. China
| | - Tianyu Peng
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, P. R. China.,Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou 730000, P. R. China
| | - Yingfan Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, P. R. China.,Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou 730000, P. R. China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, P. R. China.,Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou 730000, P. R. China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, Lanzhou 730000, P. R. China.,Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou 730000, P. R. China
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4
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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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5
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Lupidi G, Palmieri A, Petrini M. Enantioselective Catalyzed Synthesis of Amino Derivatives Using Electrophilic Open‐Chain
N
‐Activated Ketimines. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100292] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gabriele Lupidi
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
| | - Alessandro Palmieri
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
| | - Marino Petrini
- School of Science and Technology, Chemistry Division Università di Camerino via S.Agostino, 1 I-62032 Camerino Italy
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6
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Lin L, Dai C, Zhu J. Probing the origin of the stereoselectivity and enantioselectivity of cobalt-catalyzed [2 + 2] cyclization of ethylene and enynes. Org Chem Front 2021. [DOI: 10.1039/d0qo01412e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Theoretical calculations reveal the origin of the stereoselectivity and enantioselectivity of cobalt-catalyzed [2 + 2] cyclization of ethylene and enynes.
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Affiliation(s)
- Lu Lin
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Chenshu Dai
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jun Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
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7
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Siah HSM, Jónsson HF, Fiksdahl A. Au(I)-catalyzed cycloaddition pathways of non-terminal propargyl substrates. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1731550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Huey-San Melanie Siah
- Department of Chemistry, Norwegian University of Science and Technology, Hoegskoleveien, Trondheim, Norway
| | - Helgi Freyr Jónsson
- Department of Chemistry, Norwegian University of Science and Technology, Hoegskoleveien, Trondheim, Norway
| | - Anne Fiksdahl
- Department of Chemistry, Norwegian University of Science and Technology, Hoegskoleveien, Trondheim, Norway
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8
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Takizawa S. Organocatalytic Synthesis of Highly Functionalized Heterocycles by Enantioselective aza-Morita-Baylis-Hillman-Type Domino Reactions. Chem Pharm Bull (Tokyo) 2020; 68:299-315. [PMID: 32238648 DOI: 10.1248/cpb.c19-00900] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Organocatalytic enantioselective domino reactions are an extremely attractive methodology, as their use enables the construction of complex chiral skeletons from readily available starting materials in two or more steps by a single operation under mild reaction conditions. Thus, these reactions can save both the quantity of chemicals and length of time typically required for the isolation and/or purification of synthetic intermediates. Additionally, no metal contamination of the products occurs, given that organocatalysts include no expensive or toxic metals. The aza-Morita-Baylis-Hillman (aza-MBH) reaction is an atom-economical carbon-carbon bond-forming reaction between α,β-unsaturated carbonyl compounds and imines mediated by Lewis base (LB) catalysts, such as nucleophilic phosphines and amines. aza-MBH products are functionalized chiral β-amino acid derivatives that are highly valuable as pharmaceutical raw materials. Although various enantioselective aza-MBH processes have been investigated, very few studies of aza-MBH-type domino reactions have been reported due to the complexity of the aza-MBH process, which involves a Michael/Mannich/H-transfer/β-elimination sequence. Accordingly, in this review article, our recent efforts in the development of enantioselective domino reactions initiated by MBH processes are described. In the domino reactions, chiral organocatalysts bearing Brønsted acid (BA) and/or LB units impart synergistic activation to substrates, leading to the easy synthesis of highly functionalized heterocycles (some of which have tetrasubstituted and/or quaternary carbon stereocenters) in high yield and enantioselectivity.
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Affiliation(s)
- Shinobu Takizawa
- Department of Synthetic Organic Chemistry, Artificial Intelligence Research Center, The Institute of Scientific and Industrial Research, Osaka University
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9
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Wu JH, Pan J, Du J, Wang X, Wang X, Jiang C, Wang T. Enantioselective Synthesis of Multifunctionalized 4H-Pyrans via Formal [4 + 2] Annulation Process by Bifunctional Phosphonium Salt Catalysis. Org Lett 2019; 22:395-399. [DOI: 10.1021/acs.orglett.9b04079] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jia-Hong Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Jianke Pan
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Juan Du
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiaoxia Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xuemei Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Chunhui Jiang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, 2 Mengxi Road, Zhenjiang 212003, P. R. China
| | - Tianli Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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10
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Wu X, Yuan X, Yang H, Fu H. Chiral Phosphoric Acid Catalyzed Asymmetric Addition of 2-(Vinyloxy)ethanol to Imines and Applications of the Products. Org Lett 2019; 21:5335-5340. [PMID: 31247765 DOI: 10.1021/acs.orglett.9b01970] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chiral nitrogen-containing molecules such as chiral amines, azetidines, and 2-substituted tetrahydroquinolines are important privileged scaffolds in medicinal chemistry. In this paper, an efficient and highly enantioselective chiral phosphoric acid catalyzed asymmetric addition of 2-(vinyloxy)ethanol to imines has been developed for the first time, providing the corresponding chiral amines containing dioxolane acetals that can transform into useful chiral N-heterocycles including azetidines and 2-substituted tetrahydroquinolines with excellent optical purity.
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Affiliation(s)
- Xudong Wu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Xi Yuan
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Haijun Yang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Hua Fu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry , Tsinghua University , Beijing 100084 , China
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11
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Reidl TW, Anderson LL. Divergent Functionalizations of Azetidines and Unsaturated Azetidines. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900229] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tyler W. Reidl
- Department of ChemistryUniversity of Illinois at Chicago 845 W. Taylor St. Chicago, IL USA
| | - Laura L. Anderson
- Department of ChemistryUniversity of Illinois at Chicago 845 W. Taylor St. Chicago, IL USA
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12
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Mutyala R, Reddy VR, Donthi R, Kallaganti VR, Chandra R. Direct catalytic asymmetric method for the synthesis of tetrahydropyranopyrazoles through allene zwitterion chemistry. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Krishnan J, Mayadevi TS, Varughese S, Nair V. Facile Diastereoselective Synthesis of Highly Substituted Alkylene-oxetanes from 3-Alkyl Allenoates and Diaryl 1,2-Diones/α-Ketoamides Mediated by DBU. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801747] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jagadeesh Krishnan
- Chemical Sciences and Technology Division; National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695 019 Thiruvananthapuram - India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695 019 Thiruvananthapuram - India
| | - T. S. Mayadevi
- Chemical Sciences and Technology Division; National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695 019 Thiruvananthapuram - India
| | - Sunil Varughese
- Chemical Sciences and Technology Division; National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695 019 Thiruvananthapuram - India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695 019 Thiruvananthapuram - India
| | - Vijay Nair
- Chemical Sciences and Technology Division; National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695 019 Thiruvananthapuram - India
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14
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Yuan H, Tang C, Su S, Cui L, Jia X, Li C, Li J. A bicyclization reaction with two molecular allenyl ketones and isocyanides: synthesis of a lactone-containing azaspirocycle derivative. Chem Commun (Camb) 2019; 55:7231-7234. [DOI: 10.1039/c9cc02785h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel bicyclization reaction of two molecular allenyl ketones and isocyanides has been disclosed. This strategy allows for the construction of structurally complex spirocyclic lactam–lactone systems in an efficient manner.
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Affiliation(s)
- Hongdong Yuan
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute of Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Chongrong Tang
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute of Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Shikuan Su
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute of Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Lei Cui
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute of Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Xueshun Jia
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute of Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Chunju Li
- Key Laboratory of Inorganic–Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- College of Chemistry
- Tianjin Normal University
| | - Jian Li
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute of Sustainable Energy
- Shanghai University
- Shanghai 200444
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15
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Xue B, Su S, Cui Y, Fei Y, Jia X, Li J, Fang J. Phosphine-mediated sequential annulations of allenyl ketone and isocyanide: a bicyclization strategy to access a furan-fused eight-membered ring and a spirocycle. Chem Commun (Camb) 2019; 55:12180-12183. [DOI: 10.1039/c9cc06267j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Phosphine-mediated cascade annulations of allenyl ketone and isocyanide have been disclosed. This strategy enables the efficient synthesis of a furan-fused eight-membered ring and a spirocycle.
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Affiliation(s)
- Bingxiang Xue
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute for Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Shikuan Su
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute for Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Yongmei Cui
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute for Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Youwen Fei
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute for Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Xueshun Jia
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute for Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Jian Li
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute for Sustainable Energy
- Shanghai University
- Shanghai 200444
| | - Jianhui Fang
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- College of Sciences & Institute for Sustainable Energy
- Shanghai University
- Shanghai 200444
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16
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Jin T, Yuan H, Su S, Jia X, Li C, Li J, Fang J. Carbon-nitrogen bond cleavage of pyridine with two molecular substituted allenoates: access to 2-arylpyrimidin-4(3H)-one. Chem Commun (Camb) 2018; 54:14128-14131. [PMID: 30499997 DOI: 10.1039/c8cc08946a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A DABCO-catalyzed annulation reaction of pyridin-2-amine and substituted allenoates has been disclosed. This strategy allows for the ring-opening of a pyridine ring system and the formation of two new rings including a pyrimidinone ring and a benzene ring in an efficient manner.
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Affiliation(s)
- Tao Jin
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China.
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17
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Eshon J, Gerstner NC, Schomaker JM. Oxidative allene amination for the synthesis of nitrogen-containing heterocycles. ARKIVOC 2018; 2018:204-233. [PMID: 31903453 PMCID: PMC6941799 DOI: 10.24820/ark.5550190.p010.670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The prevalence of stereochemically complex amines in natural products, pharmaceuticals and other bioactive compounds, coupled with the challenges inherent in their preparation, has inspired our work to develop new and versatile methodologies for the synthesis of amine-containing stereotriads ('triads'). The key step is a highly chemo-, regio-, and stereoselective transition-metal catalyzed nitrene transfer reaction that transforms one of the cumulated double bonds of an allene precursor into a bicyclic methyleneaziridine intermediate. This account summarizes our strategies to rapidly elaborate such intermediates into stereochemically rich, densely functionalized amine triads, nitrogen heterocycles, aminated carbocycles and other useful synthetic building blocks.
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Affiliation(s)
- Josephine Eshon
- Department of Chemistry, 1101 University Avenue, Madison, WI 53706, U.S.A
| | - Nels C Gerstner
- Department of Chemistry, 1101 University Avenue, Madison, WI 53706, U.S.A
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18
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Pang S, Yang X, Cao ZH, Zhang YL, Zhao Y, Huang YY. Intermolecular [2 + 2] Cycloaddition/Isomerization of Allenyl Imides and Unactivated Imines for the Synthesis of 1-Azadienes Catalyzed by a Ni(ClO4)2·6H2O Lewis Acid. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01454] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuai Pang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Xing Yang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Ze-Hun Cao
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Yu-Long Zhang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Yan Zhao
- State Key Laboratory of Silicate Materials for Architectures, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Yi-Yong Huang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
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19
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Ma S, Yu A, Zhang L, Meng X. Phosphine-Catalyzed Domino Reaction of Thioaurones and Allenoate: Synthesis of Benzothiophene-Fused Dioxabicyclo[3.3.1]nonane Derivatives. J Org Chem 2018; 83:5410-5419. [DOI: 10.1021/acs.joc.8b00145] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shanshan Ma
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Aimin Yu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Lei Zhang
- School of Science, Tianjin Chengjian University, Tianjin 300384, People’s Republic of China
- College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
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20
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Sun YL, Wei Y, Shi M. Phosphine catalyzed δ-carbon addition and isomerization of alkynones to ketimines: the preparation of 1,3-diene substituted dihydroquinazolinones and 3-aminooxindoles. Org Chem Front 2018. [DOI: 10.1039/c7qo00772h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel strategy of the phosphine catalyzed addition of alkynones to ketimines for the synthesis of α-amino diene derivatives has been developed for the first time, thus providing diene incorporating α-amino products in moderate to excellent yields.
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Affiliation(s)
- Yao-Liang Sun
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
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21
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Rainoldi G, Faltracco M, Spatti C, Silvani A, Lesma G. Organocatalytic Access to Enantioenriched Spirooxindole-Based 4-Methyleneazetidines. Molecules 2017; 22:molecules22112016. [PMID: 29160827 PMCID: PMC6150293 DOI: 10.3390/molecules22112016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 11/15/2017] [Accepted: 11/17/2017] [Indexed: 12/28/2022] Open
Abstract
This work describes the synthesis of enantioenriched spiro compounds, incorporating the azetidine and the oxindole motifs. The preparation relies on a formal [2 + 2] annulation reaction of isatin-derived N-tert-butylsulfonyl ketimines with allenoates. The asymmetric induction is secured by an organocatalytic strategy, exploiting a bifunctional cinchona-type β-isocupridine-based catalyst. Some post-transformation products, including unexpected spiropyrroline and 3,3-disubstituted oxindole derivatives, are also presented.
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Affiliation(s)
- Giulia Rainoldi
- Department of Chemistry, University of Milan, via Golgi 19, 20133 Milan, Italy.
| | - Matteo Faltracco
- Department of Chemistry & Pharmaceutical Sciences, Amsterdam Institute of Molecules Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
| | - Claudia Spatti
- Department of Chemistry, University of Milan, via Golgi 19, 20133 Milan, Italy.
| | - Alessandra Silvani
- Department of Chemistry, University of Milan, via Golgi 19, 20133 Milan, Italy.
| | - Giordano Lesma
- Department of Chemistry, University of Milan, via Golgi 19, 20133 Milan, Italy.
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22
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Schmid SC, Guzei IA, Schomaker JM. A Stereoselective [3+1] Ring Expansion for the Synthesis of Highly Substituted Methylene Azetidines. Angew Chem Int Ed Engl 2017; 56:12229-12233. [PMID: 28834110 PMCID: PMC5693379 DOI: 10.1002/anie.201705202] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 01/08/2023]
Abstract
The reaction of rhodium-bound carbenes with strained bicyclic methylene aziridines results in a formal [3+1] ring expansion to yield highly substituted methylene azetidines with excellent regio- and stereoselectivity. The reaction appears to proceed through an ylide-type mechanism, where the unique strain and structure of the methylene aziridine promotes a ring-opening/ring-closing cascade that efficiently transfers chirality from substrate to product. The resultant products can be elaborated into new azetidine scaffolds containing vicinal tertiary-quaternary and even quaternary-quaternary stereocenters.
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Affiliation(s)
- Steven C Schmid
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
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23
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Schmid SC, Guzei IA, Schomaker JM. A Stereoselective [3+1] Ring Expansion for the Synthesis of Highly Substituted Methylene Azetidines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705202] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Steven C. Schmid
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
| | - Ilia A. Guzei
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
| | - Jennifer M. Schomaker
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
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24
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Reidl TW, Son J, Wink DJ, Anderson LL. Facile Synthesis of Azetidine Nitrones and Diastereoselective Conversion into Densely Substituted Azetidines. Angew Chem Int Ed Engl 2017; 56:11579-11583. [PMID: 28707372 DOI: 10.1002/anie.201705681] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 07/12/2017] [Indexed: 11/06/2022]
Abstract
An electrocyclization route to azetidine nitrones from N-alkenylnitrones was discovered that provides facile access to these unsaturated strained heterocycles. Reactivity studies showed that these compounds undergo a variety of reduction, cycloaddition, and nucleophilic addition reactions to form highly substituted azetidines with excellent diastereoselectivity. Taken together, these transformations provide a fundamentally different approach to azetidine synthesis than traditional cyclization by nucleophilic displacement and provide novel access to a variety of underexplored strained heterocyclic compounds.
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Affiliation(s)
- Tyler W Reidl
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Jongwoo Son
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Donald J Wink
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Laura L Anderson
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
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25
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Reidl TW, Son J, Wink DJ, Anderson LL. Facile Synthesis of Azetidine Nitrones and Diastereoselective Conversion into Densely Substituted Azetidines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705681] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tyler W. Reidl
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Jongwoo Son
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Donald J. Wink
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
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26
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Sairenji S, Kikuchi T, Abozeid MA, Takizawa S, Sasai H, Ando Y, Ohmatsu K, Ooi T, Fujita M. Determination of the absolute configuration of compounds bearing chiral quaternary carbon centers using the crystalline sponge method. Chem Sci 2017; 8:5132-5136. [PMID: 28970900 PMCID: PMC5615217 DOI: 10.1039/c7sc01524k] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 05/08/2017] [Indexed: 12/21/2022] Open
Abstract
Determination of the absolute configuration of chiral tetra-substituted carbon centers is one of the most taxing steps in the enantioselective construction of this structural motif in asymmetric synthesis. Here, we demonstrate that the crystalline sponge method provides an effective way to crystallographically determine the absolute configuration of organic compounds bearing chiral quaternary carbons (including tetra-substituted ones) that are synthesized by recently developed enantioselective catalytic reactions.
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Affiliation(s)
- Shiho Sairenji
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan .
- JST ACCEL , 4-1-8 Honcho , Kawaguchi , Saitama 332-0012 , Japan
| | - Takashi Kikuchi
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan .
- JST ACCEL , 4-1-8 Honcho , Kawaguchi , Saitama 332-0012 , Japan
| | - Mohamed Ahmed Abozeid
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , Mihogaoka , Ibaraki-shi , Osaka 567-0047 , Japan
| | - Shinobu Takizawa
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , Mihogaoka , Ibaraki-shi , Osaka 567-0047 , Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , Mihogaoka , Ibaraki-shi , Osaka 567-0047 , Japan
| | - Yuichiro Ando
- Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Nagoya 464-8602 , Japan
| | - Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Nagoya 464-8602 , Japan
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Nagoya 464-8602 , Japan
| | - Makoto Fujita
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan .
- JST ACCEL , 4-1-8 Honcho , Kawaguchi , Saitama 332-0012 , Japan
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27
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Deng YH, Chu WD, Zhang XZ, Yan X, Yu KY, Yang LL, Huang H, Fan CA. Cinchona Alkaloid Catalyzed Enantioselective [4 + 2] Annulation of Allenic Esters and in Situ Generated ortho-Quinone Methides: Asymmetric Synthesis of Functionalized Chromans. J Org Chem 2017; 82:5433-5440. [DOI: 10.1021/acs.joc.7b00370] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yu-Hua Deng
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Wen-Dao Chu
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xiang-Zhi Zhang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xu Yan
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Ke-Yin Yu
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Liang-Liang Yang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Hanmin Huang
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chun-An Fan
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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28
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Zhou W, Ni C, Chen J, Wang D, Tong X. Enantioselective Synthesis of 4H-Pyran via Amine-Catalyzed Formal (3 + 3) Annulation of δ-Acetoxy Allenoate. Org Lett 2017; 19:1890-1893. [DOI: 10.1021/acs.orglett.7b00658] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Weiping Zhou
- Shanghai
Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Chunjie Ni
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, 213164, China
| | - Jiangfei Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, 213164, China
| | - Dong Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, 213164, China
| | - Xiaofeng Tong
- Shanghai
Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, 213164, China
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29
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Chen P, Wang K, Guo W, Liu X, Liu Y, Li C. Enantioselective Reactions of 2‐Sulfonylalkyl Phenols with Allenic Esters: Dynamic Kinetic Resolution and [4+2] Cycloaddition Involving
ortho
‐Quinone Methide Intermediates. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700250] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ping Chen
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Kai Wang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Wengang Guo
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Xianghui Liu
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Yan Liu
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Can Li
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
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30
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Chen P, Wang K, Guo W, Liu X, Liu Y, Li C. Enantioselective Reactions of 2‐Sulfonylalkyl Phenols with Allenic Esters: Dynamic Kinetic Resolution and [4+2] Cycloaddition Involving
ortho
‐Quinone Methide Intermediates. Angew Chem Int Ed Engl 2017; 56:3689-3693. [DOI: 10.1002/anie.201700250] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Ping Chen
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Kai Wang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Wengang Guo
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Xianghui Liu
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Yan Liu
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Can Li
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
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31
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Liu RR, Hu JP, Hong JJ, Lu CJ, Gao JR, Jia YX. Enantioselective [2 + 2] cycloaddition of N-allenamides with cyclic N-sulfonylketimines: access to polysubstituted azetidines bearing quaternary stereocenters. Chem Sci 2017; 8:2811-2815. [PMID: 28553518 PMCID: PMC5427681 DOI: 10.1039/c6sc05450a] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 01/08/2017] [Indexed: 12/26/2022] Open
Abstract
A Ni(ClO4)2-catalyzed enantioselective [2 + 2] cycloaddition of N-allenamides with cyclic N-sulfonylketimines was developed, which regioselectively occurred at the proximal C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
C bonds of the N-allenamides.
A Ni(ClO4)2-catalyzed enantioselective [2 + 2] cycloaddition of N-allenamides with cyclic N-sulfonylketimines was developed, which regioselectively occurred at the proximal CC bonds of the N-allenamides. Broad substrate scope of N-allenamides and cyclic N-sulfonylketimines was observed. A range of fused polysubstituted azetidines bearing quaternary stereocenters were afforded in good yields and with excellent enantioselectivities (up to 99%).
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Affiliation(s)
- Ren-Rong Liu
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China .
| | - Jiang-Ping Hu
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China .
| | - Jian-Jun Hong
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China .
| | - Chuan-Jun Lu
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China .
| | - Jian-Rong Gao
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China .
| | - Yi-Xia Jia
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China .
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32
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Mehra V, Lumb I, Anand A, Kumar V. Recent advances in synthetic facets of immensely reactive azetidines. RSC Adv 2017. [DOI: 10.1039/c7ra08884a] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recent developments in synthetic strategies towards functionalized azetidines along with their versatility as heterocyclic synthons.
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Affiliation(s)
- Vishu Mehra
- Department of Chemistry
- Hindu College
- Amritsar-143005
- India
| | - Isha Lumb
- Department of Chemistry
- Baring Union Christian College
- Batala-143505
- India
| | - Amit Anand
- Department of Chemistry
- Khalsa College
- Amritsar-143005
- India
| | - Vipan Kumar
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143005
- India
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33
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Sairenji S, Lee S, Fujita M. Absolute Configuration Determination by the Crystalline Sponge Method. J SYN ORG CHEM JPN 2017. [DOI: 10.5059/yukigoseikyokaishi.75.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Makoto Fujita
- Department of Applied Chemistry, School of Engineering, The University of Tokyo
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34
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Ni C, Zhang Y, Hou Y, Tong X. Access to thiopyrano[2,3-b]indole via tertiary amine-catalyzed formal (3+3) annulations of β′-acetoxy allenoates with indoline-2-thiones. Chem Commun (Camb) 2017; 53:2567-2570. [DOI: 10.1039/c6cc09788j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amine-catalyzed formal (3+3) annulations of β′-acetoxy allenoates with indoline-2-thiones are described, which provide facile access to thiopyrano[2,3-b]indole.
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Affiliation(s)
- Chunjie Ni
- College of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yuwen Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- School of Petrochemical Engineering, Changzhou University
- Changzhou 213164
- China
| | - Yading Hou
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- School of Petrochemical Engineering, Changzhou University
- Changzhou 213164
- China
| | - Xiaofeng Tong
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- School of Petrochemical Engineering, Changzhou University
- Changzhou 213164
- China
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35
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Ngo TTD, Kishi K, Sako M, Shigenobu M, Bournaud C, Toffano M, Guillot R, Baltaze JP, Takizawa S, Sasai H, Vo-Thanh G. Organocatalyzed [4+2] Annulation of All-Carbon Tetrasubstituted Alkenes with Allenoates: Synthesis of Highly Functionalized 2H
- and 4H
-Pyran Derivatives. ChemistrySelect 2016. [DOI: 10.1002/slct.201601204] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thi-Thuy-Duong Ngo
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, ICMMO. UMR 8182. Laboratoire de Catalyse Moléculaire; Université Paris-Sud, Université Paris Saclay; 91405 Orsay Cedex France
| | - Kenta Kishi
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Osaka 567-0047 Japan
| | - Makoto Sako
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Osaka 567-0047 Japan
| | - Masashi Shigenobu
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Osaka 567-0047 Japan
| | - Chloée Bournaud
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, ICMMO. UMR 8182. Laboratoire de Catalyse Moléculaire; Université Paris-Sud, Université Paris Saclay; 91405 Orsay Cedex France
| | - Martial Toffano
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, ICMMO. UMR 8182. Laboratoire de Catalyse Moléculaire; Université Paris-Sud, Université Paris Saclay; 91405 Orsay Cedex France
| | | | | | - Shinobu Takizawa
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Osaka 567-0047 Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Osaka 567-0047 Japan
| | - Giang Vo-Thanh
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, ICMMO. UMR 8182. Laboratoire de Catalyse Moléculaire; Université Paris-Sud, Université Paris Saclay; 91405 Orsay Cedex France
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36
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Lei Y, Xing JJ, Xu Q, Shi M. Synthesis of 5,6-Dihydropyrazolo[5,1-a
]isoquinoline and Ethyl (Z
)-3-Acetoxy-3-tosylpent-4-enoate through Tertiary-Amine-Catalyzed [3+2] Annulation. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600577] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yu Lei
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai China
| | - Jiao-Jiao Xing
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai China
| | - Qin Xu
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai China
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Mei Long Road 200237 Shanghai China
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37
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Ni C, Tong X. Amine-Catalyzed Asymmetric (3 + 3) Annulations of β′-Acetoxy Allenoates: Enantioselective Synthesis of 4H-Pyrans. J Am Chem Soc 2016; 138:7872-5. [DOI: 10.1021/jacs.6b04935] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chunjie Ni
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou 213164, China
| | - Xiaofeng Tong
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou 213164, China
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38
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Takeda T, Kondoh A, Terada M. Construction of Vicinal Quaternary Stereogenic Centers by Enantioselective Direct Mannich-Type Reaction Using a Chiral Bis(guanidino)iminophosphorane Catalyst. Angew Chem Int Ed Engl 2016; 55:4734-7. [DOI: 10.1002/anie.201601352] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Indexed: 12/30/2022]
Affiliation(s)
- Tadahiro Takeda
- Process Technology Research Laboratories; Daiichi Sankyo Co., Ltd.; Edogawa-ku Tokyo 134-8630 Japan
| | - Azusa Kondoh
- Research and Analytical Center for Giant Molecules; Graduate School of Science; Tohoku University; Aoba-ku Sendai 980-8578 Japan
| | - Masahiro Terada
- Research and Analytical Center for Giant Molecules; Graduate School of Science; Tohoku University; Aoba-ku Sendai 980-8578 Japan
- Department of Chemistry; Graduate School of Science; Tohoku University; Aoba-ku Sendai 980-8578 Japan
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39
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Takeda T, Kondoh A, Terada M. Construction of Vicinal Quaternary Stereogenic Centers by Enantioselective Direct Mannich‐Type Reaction Using a Chiral Bis(guanidino)iminophosphorane Catalyst. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601352] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Tadahiro Takeda
- Process Technology Research Laboratories Daiichi Sankyo Co., Ltd. Edogawa-ku Tokyo 134-8630 Japan
| | - Azusa Kondoh
- Research and Analytical Center for Giant Molecules Graduate School of Science Tohoku University Aoba-ku Sendai 980-8578 Japan
| | - Masahiro Terada
- Research and Analytical Center for Giant Molecules Graduate School of Science Tohoku University Aoba-ku Sendai 980-8578 Japan
- Department of Chemistry Graduate School of Science Tohoku University Aoba-ku Sendai 980-8578 Japan
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40
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Li Y, Du S, Du Z, Chen C. A theoretical study of DABCO and PPh3 catalyzed annulations of allenoates with azodicarboxylate. RSC Adv 2016. [DOI: 10.1039/c6ra19308k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Previous experiments have shown that DABCO-catalyzed annulation of 2,3-butadienoate and diethylazodicarboxylate leads to 1,2-diazetidine (reaction (1)), whereas PPh3-catalyzed 2-benzyl-2,3-butadienoate and diethylazodicarboxylate gives pyrazoline (reaction (2)).
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Affiliation(s)
- Yan Li
- School of Petroleum and Chemical Engineering
- Dalian University of Technology
- Panjin
- China
| | - Shiwen Du
- School of Petroleum and Chemical Engineering
- Dalian University of Technology
- Panjin
- China
| | - Zheng Du
- National Supercomputing Center in Shenzhen (Shenzhen Cloud Computing Center)
- Shenzhen
- China
| | - Congmei Chen
- National Supercomputing Center in Shenzhen (Shenzhen Cloud Computing Center)
- Shenzhen
- China
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41
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Rainoldi G, Faltracco M, Lo Presti L, Silvani A, Lesma G. Highly diastereoselective entry into chiral spirooxindole-based 4-methyleneazetidines via formal [2+2] annulation reaction. Chem Commun (Camb) 2016; 52:11575-8. [DOI: 10.1039/c6cc05838h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We describe here a diastereoselective, DABCO-catalyzed reaction of allenoates with chiral N-tert-butanesulfinyl ketimines derived from isatin.
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Affiliation(s)
- G. Rainoldi
- Dipartimento di Chimica
- Università degli Studi di Milano
- Milano
- Italy
| | - M. Faltracco
- Dipartimento di Chimica
- Università degli Studi di Milano
- Milano
- Italy
| | - L. Lo Presti
- Dipartimento di Chimica
- Università degli Studi di Milano
- Milano
- Italy
| | - A. Silvani
- Dipartimento di Chimica
- Università degli Studi di Milano
- Milano
- Italy
| | - G. Lesma
- Dipartimento di Chimica
- Università degli Studi di Milano
- Milano
- Italy
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42
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Lee HJ, Cho CW. Enantioselective Phase-Transfer-Catalyzed Synthesis of Chiral N-Substituted 3,3-Dinitroazetidines by Aza-Michael Reaction. J Org Chem 2015; 80:11435-40. [DOI: 10.1021/acs.joc.5b02124] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyo-Jun Lee
- Department of Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Chang-Woo Cho
- Department of Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea
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43
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Takizawa S, Kishi K, Yoshida Y, Mader S, Arteaga FA, Lee S, Hoshino M, Rueping M, Fujita M, Sasai H. Phosphine-Catalyzed β,γ-Umpolung Domino Reaction of Allenic Esters: Facile Synthesis of Tetrahydrobenzofuranones Bearing a Chiral Tetrasubstituted Stereogenic Carbon Center. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508022] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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44
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Takizawa S, Kishi K, Yoshida Y, Mader S, Arteaga FA, Lee S, Hoshino M, Rueping M, Fujita M, Sasai H. Phosphine‐Catalyzed β,γ‐Umpolung Domino Reaction of Allenic Esters: Facile Synthesis of Tetrahydrobenzofuranones Bearing a Chiral Tetrasubstituted Stereogenic Carbon Center. Angew Chem Int Ed Engl 2015; 54:15511-5. [DOI: 10.1002/anie.201508022] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Shinobu Takizawa
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki‐shi, Osaka 567‐0047 (Japan) http://www.sanken.osaka‐u.ac.jp/labs/soc/socmain.html
| | - Kenta Kishi
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki‐shi, Osaka 567‐0047 (Japan) http://www.sanken.osaka‐u.ac.jp/labs/soc/socmain.html
| | - Yasushi Yoshida
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki‐shi, Osaka 567‐0047 (Japan) http://www.sanken.osaka‐u.ac.jp/labs/soc/socmain.html
| | - Steffen Mader
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany)
| | - Fernando Arteaga Arteaga
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki‐shi, Osaka 567‐0047 (Japan) http://www.sanken.osaka‐u.ac.jp/labs/soc/socmain.html
| | - Shoukou Lee
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113‐8656 (Japan)
| | - Manabu Hoshino
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113‐8656 (Japan)
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen (Germany)
| | - Makoto Fujita
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo 113‐8656 (Japan)
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki‐shi, Osaka 567‐0047 (Japan) http://www.sanken.osaka‐u.ac.jp/labs/soc/socmain.html
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45
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Xu S, Chen J, Shang J, Qing Z, Zhang J, Tang Y. Divergent amine-catalyzed [2+2] annulation of allenoates with azodicarboxylates: facile synthesis of 1,2-diazetidines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.151] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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46
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Zhang S, Luo YC, Hu XQ, Wang ZY, Liang YM, Xu PF. Enantioselective Amine-Catalyzed [4 + 2] Annulations of Allene Ketones and 2,3-Dioxopyrrolidine Derivatives: Synthesis of 4H-Pyran Derivatives. J Org Chem 2015; 80:7288-94. [DOI: 10.1021/acs.joc.5b00961] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Shuang Zhang
- State
Key Laboratory of Applied Organic Chemistry, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Chun Luo
- State
Key Laboratory of Applied Organic Chemistry, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiu-Qin Hu
- State
Key Laboratory of Applied Organic Chemistry, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhu-Yin Wang
- College
of Mechanics and Materials, Hohai University, Nanjing 210098, P. R. China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peng-Fei Xu
- State
Key Laboratory of Applied Organic Chemistry, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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47
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Wang F, Yang C, Xue XS, Li X, Cheng JP. A Highly Efficient Chirality Switchable Synthesis of Dihydropyran-Fused Benzofurans by Fine-Tuning the Phenolic Proton of β-Isocupreidine (β-ICD) Catalyst with Methyl. Chemistry 2015; 21:10443-9. [PMID: 26059531 DOI: 10.1002/chem.201501145] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Indexed: 01/03/2023]
Abstract
A highly enantioselective β-isocupreidine (β-ICD) catalyzed synthesis of dihydropyran-fused benzofurans through [4+2] cycloaddition of allenoates and benzofuranone alkenes was developed. Switchable chirality inversion of cycloaddition products was achieved by replacing the phenolic proton of the catalyst with a methyl, demonstrating an amazing effect of minimal structural variation on inverting enantioselectivity. DFT calculations were utilized to elucidate the origin of the observed phenomena. Computation also provided a clue for a rational design in which the multi-hydrogen bond with the alcohol additive was found to improve the enantioselectivity of the cycloaddition. Finally, the substrate scope was examined, in which a number of functionalized dihydropyran-fused benzofurans could be obtained in high yields (up to 97 %) with very good regio- (>20:1) and enantioselectivities (up to 98:2 e.r.).
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Affiliation(s)
- Feng Wang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China)
| | - Chen Yang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China)
| | - Xiao-Song Xue
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China)
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China).
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China).
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48
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Yang HB, Yuan YC, Wei Y, Shi M. Amine-catalyzed tunable reactions of allenoates with dithioesters: formal [4+2] and [2+2] cycloadditions for the synthesis of 2,3-dihydro-1,4-oxathiines and enantioenriched thietanes. Chem Commun (Camb) 2015; 51:6430-3. [PMID: 25766965 DOI: 10.1039/c5cc01313e] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chemoselective [4+2] vs. [2+2] cycloaddition between allenoates and dithioesters can be controlled by switching the nucleophilic amine catalyst. The two modes of cyclizations represent the first example of controllable and chemoselective annulations between allenoates and dienophiles catalyzed by amine. These cyclizations are useful in offering a divergent synthesis of sulfur-containing heterocycles. On the basis of this investigation, it can be realized that dithioesters with a vicinal electron-withdrawing group can react not only like a Michael acceptor but also as a ketone or imine.
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Affiliation(s)
- Hai-Bin Yang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
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49
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Dobi Z, Holczbauer T, Soós T. Strain-Driven Direct Cross-Aldol and -Ketol Reactions of Four-Membered Heterocyclic Ketones. Org Lett 2015; 17:2634-7. [DOI: 10.1021/acs.orglett.5b01002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Zoltán Dobi
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
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50
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Wang F, Li Z, Wang J, Li X, Cheng JP. Enantioselective Synthesis of Dihydropyran-Fused Indoles through [4+2] Cycloaddition between Allenoates and 3-Olefinic Oxindoles. J Org Chem 2015; 80:5279-86. [PMID: 25893317 DOI: 10.1021/acs.joc.5b00212] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly enantioselective [4+2] annulation with respect to allenoates and 3-olefinic oxindoles catalyzed by Lewis base was reported, which proved to be an efficient way to synthesize chiral dihydropyran-fused indoles. The cycloaddition products were generally obtained in high yields (up to 98%) with very good enantioselectivities (up to 94% enantiomeric excess).
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Affiliation(s)
- Feng Wang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhen Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071, P. R. China
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