1
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Li G, Zhang Y, Zeng H, Feng X, Su Z, Lin L. Water enables diastereodivergency in bispidine-based chiral amine-catalyzed asymmetric Mannich reaction of cyclic N-sulfonyl ketimines with ketones. Chem Sci 2022; 13:4313-4320. [PMID: 35509468 PMCID: PMC9006921 DOI: 10.1039/d2sc00446a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/20/2022] [Indexed: 01/23/2023] Open
Abstract
Tuning diastereoselectivity is a great challenge in asymmetric catalysis for the inherent stereochemical bias of the substrates. Here, we report a diastereodivergent asymmetric Mannich reaction of cyclic N-sulfonyl ketimines with ketones catalyzed by a bispidine-based chiral amine catalyst, in which additional water switches the diastereoselectivity efficiently. Both chiral anti- and syn-benzosultams with potential anti-HIV-1 activity are obtained in excellent yields and good to excellent ee values. Control experiments and density functional theory (DFT) calculations were applied to study the diastereodivergent mechanism, which reveal that the diastereodivergent catalysis should be state-determined, and the water reverses the energies of states to realize the diastereodivergency. The findings are quite new and might inspire more diastereodivergent asymmetric synthesis. A diastereodivergent asymmetric Mannich reaction of cyclic N-sulfonyl ketimines with ketones is realized by employing bispidine-based chiral amine as catalyst and additional water switching the diastereoselectivity.![]()
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Affiliation(s)
- Gonglin Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Yan Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Hongkun Zeng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
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2
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Li Y, Dong M, Gao N, Cao G, Teng D. Zn (II)/spiroQuinox catalyzed asymmetric Friedel–Crafts alkylation of indoles with cyclic
N
‐sulfonyl ketimino esters. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yanshun Li
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Mengqi Dong
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Nanxing Gao
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Guorui Cao
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
| | - Dawei Teng
- College of Chemical Engineering Qingdao University of Science and Technology Qingdao China
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3
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del Corte X, Martínez de Marigorta E, Palacios F, Vicario J, Maestro A. An overview of the applications of chiral phosphoric acid organocatalysts in enantioselective additions to CO and CN bonds. Org Chem Front 2022. [DOI: 10.1039/d2qo01209j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Since 2004, chiral phosphoric acids (CPAs) have emerged as highyl efficient organocatalysts, providing excellent results in a wide reaction scope. In this review, the applications of CPA for enantioselective additions to CO and CN bonds are covered.
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Affiliation(s)
- Xabier del Corte
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Edorta Martínez de Marigorta
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Javier Vicario
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Aitor Maestro
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
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4
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Li M, Chen Y, Yan Y, Liu M, Huang M, Li W, Cao L, Zhang X. Organocatalytic asymmetric synthesis of quaternary α-isoxazole–α-alkynyl amino acid derivatives. Org Biomol Chem 2022; 20:8849-8854. [DOI: 10.1039/d2ob01746f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Chiral phosphoric acid catalyzed enantioselective addition of 5-amino-isoxazoles with β,γ-alkynyl-α-ketimino esters provided good yields and excellent enantioselectivities.
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Affiliation(s)
- Min Li
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yihua Chen
- Department of Chemistry, Xihua University, China
| | - Yingkun Yan
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Min Liu
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Min Huang
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wenzhe Li
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lianyi Cao
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiaomei Zhang
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
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5
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Guin S, Majee D, Samanta S. Unmasking the reverse reactivity of cyclic N-sulfonyl ketimines: multifaceted applications in organic synthesis. Chem Commun (Camb) 2021; 57:9010-9028. [PMID: 34498642 DOI: 10.1039/d1cc03439a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The chemistry related to the exploration of cyclic N-sulfonyl ketimines and their derivatives has attracted significant attention in the last few decades because of their intriguing structures and properties. They serve broadly as reactive synthons in various reactions to create a diverse set of synthetically and biologically attractive molecules. Furthermore, these moieties, which possess multiple heteroatoms (N, O and S), display or can enhance many biological activities. In the case of synthetic reactions, chemists mainly focus on the chemical manipulation of the highly reactive prochiral CN bond of N-sulfonyl ketimines. Besides their traditional role as electrophiles, N-sulfonyl ketimines possess α-Csp3-H protons, and thus behave as potential carbonucleophiles, where they can undergo several C-X (X = C, N and O) bond-forming reactions with different types of electrophiles under various conditions to form a wide range of fascinating asymmetric and non-asymmetric versions of fused heterocycles, carbocycles, spiro-fused skeletons, pyridines, pyrroles, etc. Herein, we highlight the recent examples from our research work and others covering the scope of cyclic N-sulfonyl ketimines as useful carbonucleophiles. In addition, the detailed mechanistic studies of the above-mentioned reactions are also presented.
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Affiliation(s)
- Soumitra Guin
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India.
| | - Debashis Majee
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India.
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India.
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6
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Gaviña D, Escolano M, Torres J, Alzuet‐Piña G, Sánchez‐Roselló M, Pozo C. Organocatalytic Enantioselective Friedel‐Crafts Alkylation Reactions of Pyrroles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100313] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Daniel Gaviña
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
| | - Marcos Escolano
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
| | - Javier Torres
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
| | - Gloria Alzuet‐Piña
- Department of Inorganic Chemistry University of Valencia E-46100 Burjassot Spain
| | | | - Carlos Pozo
- Department of Organic Chemistry University of Valencia E-46100 Burjassot Spain
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7
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Boylan A, Nguyen TS, Lundy BJ, Li JY, Vallakati R, Sundstrom S, May JA. Rate Dependence on Inductive and Resonance Effects for the Organocatalyzed Enantioselective Conjugate Addition of Alkenyl and Alkynyl Boronic Acids to β-Indolyl Enones and β-Pyrrolyl Enones. Molecules 2021; 26:1615. [PMID: 33799473 PMCID: PMC8000498 DOI: 10.3390/molecules26061615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 12/01/2022] Open
Abstract
Two key factors bear on reaction rates for the conjugate addition of alkenyl boronic acids to heteroaryl-appended enones: the proximity of inductively electron-withdrawing heteroatoms to the site of bond formation and the resonance contribution of available heteroatom lone pairs to stabilize the developing positive charge at the enone β-position. For the former, the closer the heteroatom is to the enone β-carbon, the faster the reaction. For the latter, greater resonance stabilization of the benzylic cationic charge accelerates the reaction. Thus, reaction rates are increased by the closer proximity of inductive electron-withdrawing elements, but if resonance effects are involved, then increased rates are observed with electron-donating ability. Evidence for these trends in isomeric substrates is presented, and the application of these insights has allowed for reaction conditions that provide improved reactivity with previously problematic substrates.
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Affiliation(s)
- Amy Boylan
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Fleming Building 112, Houston, TX 77204-5003, USA; (A.B.); (T.S.N.); (B.J.L.); (J.-Y.L.); (R.V.); (S.S.)
| | - Thien S. Nguyen
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Fleming Building 112, Houston, TX 77204-5003, USA; (A.B.); (T.S.N.); (B.J.L.); (J.-Y.L.); (R.V.); (S.S.)
- Graduate School of Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Brian J. Lundy
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Fleming Building 112, Houston, TX 77204-5003, USA; (A.B.); (T.S.N.); (B.J.L.); (J.-Y.L.); (R.V.); (S.S.)
- Baker Hughes, 17021 Aldine Westfield Rd, Houston, TX 77073, USA
| | - Jian-Yuan Li
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Fleming Building 112, Houston, TX 77204-5003, USA; (A.B.); (T.S.N.); (B.J.L.); (J.-Y.L.); (R.V.); (S.S.)
- Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Ravikrishna Vallakati
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Fleming Building 112, Houston, TX 77204-5003, USA; (A.B.); (T.S.N.); (B.J.L.); (J.-Y.L.); (R.V.); (S.S.)
- Vallark Pharma Pvt. Ltd., Genome Valley, Turkapally, Hyderabad 500078, India
| | - Sasha Sundstrom
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Fleming Building 112, Houston, TX 77204-5003, USA; (A.B.); (T.S.N.); (B.J.L.); (J.-Y.L.); (R.V.); (S.S.)
- Department of Chemistry and Biochemistry, Baylor Sciences Bldg. D.208, One Bear Place #97348, Waco, TX 76798, USA
| | - Jeremy A. May
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Fleming Building 112, Houston, TX 77204-5003, USA; (A.B.); (T.S.N.); (B.J.L.); (J.-Y.L.); (R.V.); (S.S.)
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8
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Egorov IN, Santra S, Kopchuk DS, Kovalev IS, Zyryanov GV, Majee A, Ranu BC, Rusinov VL, Chupakhin ON. Direct Asymmetric Arylation of Imines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000548] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ilya N. Egorov
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
| | - Sougata Santra
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
| | - Dmitry S. Kopchuk
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division) 22/20, S. Kovalevskoy/Akademicheskaya Str. Yekaterinburg 62099 Russian Federation
| | - Igor S. Kovalev
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
| | - Grigory V. Zyryanov
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division) 22/20, S. Kovalevskoy/Akademicheskaya Str. Yekaterinburg 62099 Russian Federation
| | - Adinath Majee
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Brindaban C. Ranu
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur Kolkata 700032 India
| | - Vladimir L. Rusinov
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division) 22/20, S. Kovalevskoy/Akademicheskaya Str. Yekaterinburg 62099 Russian Federation
| | - Oleg N. Chupakhin
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division) 22/20, S. Kovalevskoy/Akademicheskaya Str. Yekaterinburg 62099 Russian Federation
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9
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Hou L, Kang T, Yang L, Cao W, Feng X. Enantioselective Imino-Ene Reaction of N-Sulfonyl Ketimines with Silyl Enol Ethers: Access to Chiral Benzosultams. Org Lett 2020; 22:1390-1395. [PMID: 31990193 DOI: 10.1021/acs.orglett.0c00004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A highly efficient asymmetric imino-ene reaction of cyclic ketimines with silyl enol ethers was developed. Various chiral benzosultam derivatives were obtained in excellent yields (up to 99%), enantioselectivities (up to 99% ee), and diastereoselectivities (up to >19:1 dr) by utilizing a Ni(BF4)2·6H2O/N,N'-dioxide complex as the catalyst. A possible transition state model was proposed to explain the stereoinduction. Furthermore, the synthetic utility of the protocol provided quick access to optically pure HIV-1 inhibitor.
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Affiliation(s)
- Liuzhen Hou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
| | - Tengfei Kang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
| | - Liangkun Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , China
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10
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Xie E, Huang S, Lin X. Design of Planar Chiral Phosphoric Acids with a [2.2]Paracyclophanyl Backbone as Organocatalysts for the Highly Enantioselective Aza-Friedel–Crafts Reaction. Org Lett 2019; 21:3682-3686. [DOI: 10.1021/acs.orglett.9b01127] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- En Xie
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Shaoying Huang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Xufeng Lin
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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11
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Miyagawa M, Yoshida M, Kiyota Y, Akiyama T. Enantioselective Friedel–Crafts Alkylation Reaction of Heteroarenes with N‐Unprotected Trifluoromethyl Ketimines by Means of Chiral Phosphoric Acid. Chemistry 2019; 25:5677-5681. [DOI: 10.1002/chem.201901020] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Indexed: 02/04/2023]
Affiliation(s)
- Masamichi Miyagawa
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
| | - Masaru Yoshida
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
| | - Yuki Kiyota
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
| | - Takahiko Akiyama
- Department of ChemistryFaculty of ScienceGakushuin University, Mejiro Toshima-ku Tokyo 171-8588 Japan
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12
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Fan CL, Hu K, Wang JL, Hao XQ, Wei JJ, Song MP, Zheng C. Synthesis of quaternary succinimides promoted by Ferric Nitrate. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.11.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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13
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Yonesaki R, Kondo Y, Akkad W, Sawa M, Morisaki K, Morimoto H, Ohshima T. 3-Mono-Substituted BINOL Phosphoric Acids as Effective Organocatalysts in Direct Enantioselective Friedel-Crafts-Type Alkylation of N-Unprotected α-Ketiminoester. Chemistry 2018; 24:15211-15214. [PMID: 30098059 DOI: 10.1002/chem.201804078] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Indexed: 11/08/2022]
Abstract
Although BINOL-derived phosphoric acids are among the most widely used chiral Brønsted acid organocatalysts, their structures are mostly limited to 3,3'-disubstituted ones and simple 3-mono-substituted ones without any polar functionalities on the 3-substituent have not been used in highly enantioselective reactions. This work reports such 3-mono-substituted analogues as effective organocatalysts in direct highly enantioselective Friedel-Crafts-type alkylation of N-unprotected α-ketiminoester. The origin of the observed high enantioselectivity with the 3-mono-substituted catalyst is also discussed.
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Affiliation(s)
- Ryohei Yonesaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yuta Kondo
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Walaa Akkad
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masanao Sawa
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kazuhiro Morisaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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14
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Li X, Song Q. Recent advances in asymmetric reactions catalyzed by chiral phosphoric acids. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2018.01.045] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Cheng DJ, Shao YD. Organocatalytic Asymmetric Transformations Involving the Cyclic Imine Moiety in Indole and Isoindole Related Heterocycles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800345] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dao-Juan Cheng
- Department of Chemistry and Chemical Engineering; Heze University; Heze 274015 People's Republic of China
| | - You-Dong Shao
- Department of Chemistry and Chemical Engineering; Heze University; Heze 274015 People's Republic of China
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16
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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] [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. A sulfa-Michael/aldol cascade reaction of 1,4-dithiane-2,5-diol and α-aryl-β-nitroacrylate has been developed, which allows access to 2,5-dihydrothiophenes bearing a quaternary carbon center 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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17
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Simón L. Enantioselectivity in CPA-catalyzed Friedel–Crafts reaction of indole and N-tosylimines: a challenge for guiding models. Org Biomol Chem 2018; 16:2225-2238. [DOI: 10.1039/c7ob02875j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Reaction models derived from theoretical investigations for predicting the enantioselectivity of organocatalytic reactions are very useful, but difficult to formulate for the Friedel–Crafts reaction of indole and N-tosylimines.
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Affiliation(s)
- Luis Simón
- Facultad de Ciencias Químicas
- Universidad de Salamanca
- Salamanca E37004
- Spain
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18
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Nakamura S, Furukawa T, Hatanaka T, Funahashi Y. Enantioselective aza-Friedel–Crafts reaction of cyclic ketimines with indoles using chiral imidazoline–phosphoric acid catalysts. Chem Commun (Camb) 2018; 54:3811-3814. [DOI: 10.1039/c8cc00594j] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A highly enantioselective aza-Friedel Crafts reaction of cyclic 4-aryl-3-oxo-1,2,5-thiadiazol-1,1-oxides as cyclic ketimines with indoles was developed.
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Affiliation(s)
- Shuichi Nakamura
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology
- Showa-ku
- Japan
- Frontier Research Institute for Material Science, Nagoya Institute of Technology
- Showa-ku
| | - Takashi Furukawa
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology
- Showa-ku
- Japan
| | - Tsubasa Hatanaka
- Department of Chemistry, Graduate School of Science, Osaka University
- Toyonaka
- Japan
| | - Yasuhiro Funahashi
- Department of Chemistry, Graduate School of Science, Osaka University
- Toyonaka
- Japan
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