1
|
Jin HS, Zhu T. Synthesis of Benzofuran-Fused Oxepines through Cs 2CO 3-Promoted [4 + 3] Annulation of Aurones with Crotonate-Derived Sulfonium Salts. J Org Chem 2024; 89:3271-3278. [PMID: 38332626 DOI: 10.1021/acs.joc.3c02715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Benzofuran-fused derivatives display important and reliable therapeutic properties. Herein, we describe the synthesis of benzofuran-fused oxepines using aurones and crotonate-derived sulfonium salts via a [4 + 3] annulation reaction in the presence of Cs2CO3. This reaction proceeds under mild and operationally simple conditions. The synthetic utility of this approach was highlighted by several transformations, including the efficient synthesis of a novel tetracyclic fused benzofuran derivative.
Collapse
Affiliation(s)
- Hai-Shan Jin
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| | - Tong Zhu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| |
Collapse
|
2
|
John D, George K, Radhakrishnan EK. A concise update on the synthetic transformation of aurones via asymmetric cycloaddition, annulation, and Michael/Mannich reactions. RSC Adv 2024; 14:6339-6359. [PMID: 38380237 PMCID: PMC10877098 DOI: 10.1039/d3ra08575a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/13/2024] [Indexed: 02/22/2024] Open
Abstract
This review provides a comprehensive overview of the significance of aurone cores in organic chemistry, highlighting their crucial role as synthetic intermediates. With their innate electrophilic reactivity and convenient accessibility, aurone cores play a vital role in catalysing the development of novel methodologies and facilitating the creation of intricate compounds. The objective of this review is to present a current and insightful compilation that summarizes the progress in aurone synthetic transformations, focusing on diverse cycloaddition ([3 + 2], [4 + 2], [4 + 3], [10 + 2]) and annulation reactions.
Collapse
Affiliation(s)
- Deepa John
- Department of Chemistry, Vellore Institute of Technology Vellore India
| | - Kevin George
- Department of Chemistry, Vellore Institute of Technology Vellore India
| | | |
Collapse
|
3
|
Waser M, Winter M, Mairhofer C. (Thio)urea containing chiral ammonium salt catalysts. CHEM REC 2022:e202200198. [PMID: 36175162 DOI: 10.1002/tcr.202200198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/25/2022] [Indexed: 11/08/2022]
Abstract
(Thio)-urea-containing bifunctional quaternary ammonium salts emerged as powerful non-covalently interacting organocatalysts over the course of the last decade. The most commonly employed catalysts in this field are either based on Cinchona alkaloids, α-amino acids, or trans-cyclohexane-1,2-diamine. Our group has been heavily engaged in the design and use of such catalysts, i. e. trans-cyclohexane-1,2-diamine-based ones for around 10 years now, and it is therefore the intention of this short personal account to provide an overview of the, at least in our opinion, most significant and pioneering achievements in this field by looking on catalyst design and asymmetric method development, with a special focus on our own contributions.
Collapse
Affiliation(s)
- Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040, Linz, Austria
| | - Michael Winter
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040, Linz, Austria
| | - Christopher Mairhofer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040, Linz, Austria
| |
Collapse
|
4
|
Lin H, Gu J, Luo S, Gu Q, Cao X, Ge Y, Wang C, Yuan C, Wang H. DBU‐Catalyzed [3+2] Cycloaddition of Benzoaurones with 3‐Homoacyl Coumarins: Synthesis of Spiro[Benzofuranone‐Cyclopentane] Compounds. ChemistrySelect 2022. [DOI: 10.1002/slct.202201599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Huawei Lin
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| | - Jing Gu
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| | - Shan Luo
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| | - Qilong Gu
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| | - Xiaoqun Cao
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| | - Yanqing Ge
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| | - Chang Wang
- School of Pharmaceutical Sciences Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
- Medical Science and Technology Innovation Center Shandong First Medical University & Shandong Academy of Medical Sciences Jinan 250117 Shandong P. R. China
| | - Chunhao Yuan
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| | - Hai Wang
- School of Chemistry and Pharmaceutical Engineering Shandong First Medical University & Shandong Academy of Medical Sciences Taian 271016 Shandong P. R. China
| |
Collapse
|
5
|
Wang RL, Jia SK, Guo YJ, Yi Y, Hua YZ, Lu HJ, Wang MC. Dinuclear zinc-catalyzed enantioselective formal [3 + 2] cycloaddition of N-2,2,2-trifluoroethylisatin ketimines with low reactivity aurone derivatives. Org Biomol Chem 2021; 19:8492-8496. [PMID: 34549771 DOI: 10.1039/d1ob01599k] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Highly enantioselective formal [3 + 2] cycloaddition of N-2,2,2-trifluoroethylisatin ketimines with aurone derivatives of low reactivity using chiral dinuclear zinc catalysts has been developed via a Brønsted base and Lewis acid cooperative activation model. These transformations involving a domino Michael/Mannich reaction sequence led to efficient construction of a range of chiral spiro[benzofuran-pyrrolidine] scaffolds bearing three biologically relevant heterocyclic moieties and two adjacent spiro quaternary stereocenters in high yields (up to 95%) and with good enantioselectivities (up to 99% ee).
Collapse
Affiliation(s)
- Rui-Li Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Shi-Kun Jia
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Ya-Jun Guo
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Yang Yi
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Yuan-Zhao Hua
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Hui-Jie Lu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Min-Can Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| |
Collapse
|
6
|
Fang G, Wang H, Zheng C, Pan L, Zhao G. Enantioselectivity switch in asymmetric Michael addition reactions using phosphonium salts. Org Biomol Chem 2021; 19:6334-6340. [PMID: 34231639 DOI: 10.1039/d1ob01027a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Efficient access to two enantiomers of one chiral compound is critical for the discovery of drugs. However, it is still a challenging problem owing to the difficulty in obtaining two enantiomers of one chiral catalyst. Here, we report a general method to obtain both enantiomeric products via fine tuning the hydrogen-bonding interactions of phosphonium salts. Amino acid derived phosphonium salts and dipeptide derived phosphonium salts exhibited different properties for controlling the transition state, which could efficiently promote the Michael addition reaction to give opposite configurations of products with high yields and enantioselectivities. Preliminary investigations on the mechanism of the reaction and applications of the products were also performed.
Collapse
Affiliation(s)
- Guosheng Fang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, China.
| | - Hongyu Wang
- Center for Excellence in Molecular Synthesis, Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 LingLing Road, Shanghai 200032, China
| | - Changwu Zheng
- Center for Excellence in Molecular Synthesis, Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 LingLing Road, Shanghai 200032, China
| | - Lu Pan
- Center for Excellence in Molecular Synthesis, Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 LingLing Road, Shanghai 200032, China
| | - Gang Zhao
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, China. and Center for Excellence in Molecular Synthesis, Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 LingLing Road, Shanghai 200032, China
| |
Collapse
|
7
|
Liu B, Yan R, Li X, Du W, Chen Y. Asymmetric [3+2] Annulations of Thioaurone and Aurone Derivatives for the Construction of Spiroheterocycles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100078] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bao‐Xin Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University 610041 Chengdu P. R. China
| | - Ru‐Jie Yan
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University 610041 Chengdu P. R. China
| | - Xiao‐Xun Li
- Chengdu Easton Biopharmaceuticals Co. Ltd. 611731 Chengdu P. R. China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University 610041 Chengdu P. R. China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University 610041 Chengdu P. R. China
| |
Collapse
|
8
|
A flexible strategy for the synthesis of bifunctional 6′-(thio)-urea containing Cinchona alkaloid ammonium salts. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
9
|
A novel quaternary ammonium salts derived from α-amino acids with large steric hindrance group and its application in asymmetric Mannich reaction. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131484] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Deng Q, Meng X. Recent Advances in the Cycloaddition Reactions of 2‐Benzylidene‐1‐benzofuran‐3‐ones, and Their Sulfur, Nitrogen and Methylene Analogues. Chem Asian J 2020; 15:2838-2853. [DOI: 10.1002/asia.202000550] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/13/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Qingsong Deng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
| |
Collapse
|
11
|
Su Y, Ma C, Zhao Y, Yang C, Feng Y, Wang KH, Huang D, Huo C, Hu Y. Regioselective synthesis of spiro naphthofuranone-pyrazoline via a [3+2] cycloaddition of benzoaurones with nitrile imines. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131355] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
12
|
Duan K, An XD, Li LF, Sun LL, Qiu B, Li XJ, Xiao J. Hydride Transfer Initiated Redox-Neutral Cascade Cyclizations of Aurones: Facile Access to [6,5] Spirocycles. Org Lett 2020; 22:2537-2541. [PMID: 32186385 DOI: 10.1021/acs.orglett.0c00309] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Reported herein is the hydride transfer initiated redox-neutral cascade cyclizations of aurones, providing a variety of [6,5] spiro-heterocycles in satisfactory yields and good diastereoselectivities.
Collapse
Affiliation(s)
- Kang Duan
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xiao-De An
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Long-Fei Li
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Lian-Lian Sun
- The Affiliated Hospital of Huizhou Health Sciences Polytechnic, Huizhou, 516025, China
| | - Bin Qiu
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xian-Jiang Li
- Shandong Kangqiao Biotechnology Co. Ltd., Binzhou, 256500, China
| | - Jian Xiao
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China.,School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| |
Collapse
|
13
|
Du M, Yu L, Du T, Li Z, Luo Y, Meng X, Tian Z, Zheng C, Cao W, Zhao G. N-Protecting group tuning of the enantioselectivity in Strecker reactions of trifluoromethyl ketimines to synthesize quaternary α-trifluoromethyl amino nitriles by ion pair catalysis. Chem Commun (Camb) 2020; 56:1581-1584. [PMID: 31934692 DOI: 10.1039/c9cc09151c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective Strecker reaction to construct trifluoromethylated quaternary stereocenters with N-PMP and unexplored N-Boc trifluoromethyl ketimines catalyzed using an organophosphine dual-reagent catalyst has been developed. The enantioselectivities of the corresponding products with the same catalyst could be switched by using different N-protecting groups (N-PMP or N-Boc). The trifluoromethyl amino nitriles were obtained in high yield and high enantioselectivity in a short time and could be easily converted to a variety of useful trifluoromethyl-containing compounds.
Collapse
Affiliation(s)
- Mengyuan Du
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, P. R. China.
| | - Longhui Yu
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Ting Du
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Zhaokun Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Yueyang Luo
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Xiangyu Meng
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Zhengtao Tian
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Weiguo Cao
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, P. R. China.
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| |
Collapse
|
14
|
Ali AT, Hekal MH. Convenient synthesis and anti-proliferative activity of some benzochromenes and chromenotriazolopyrimidines under classical methods and phase transfer catalysis. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1675173] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Amira T. Ali
- Faculty of Science, Chemistry Department, Ain Shams University, Cairo, Egypt
| | - Mohamed H. Hekal
- Faculty of Science, Chemistry Department, Ain Shams University, Cairo, Egypt
| |
Collapse
|
15
|
Zhu L, Ren X, Liao Z, Pan J, Jiang C, Wang T. Asymmetric Three-Component Cyclizations toward Structurally Spiro Pyrrolidines via Bifunctional Phosphonium Salt Catalysis. Org Lett 2019; 21:8667-8672. [DOI: 10.1021/acs.orglett.9b03282] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lixiang Zhu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiaoyu Ren
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Zhongxiu Liao
- 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
| | - 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
| |
Collapse
|
16
|
Affiliation(s)
- Hongyu Wang
- College of Chemistry, Chemical Engineering and Materials ScienceShandong Normal University Jinan Shandong 250014 China
| | - Changwu Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai 200032 China
- School of PharmacyShanghai University of Traditional Chinese Medicine Shanghai 201203 China
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai 200032 China
| |
Collapse
|
17
|
L-tert-Leucine derived urea-ammonium salts: Efficient bifunctional phase transfer catalysts for highly diastereo- and enantioselective aza-Henry reaction of isatin-derived N-Boc ketimines with α-aryl nitromethanes. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
18
|
Fang G, Zheng C, Cao D, Pan L, Hong H, Wang H, Zhao G. Asymmetric cyclizations via a sequential Michael addition/Conia-ene reaction by combining multifunctional quaternary phosphonium salt and silver catalysis. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
19
|
Chiral Phase-Transfer Catalysts with Hydrogen Bond: A Powerful Tool in the Asymmetric Synthesis. Catalysts 2019. [DOI: 10.3390/catal9030244] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Asymmetric phase-transfer catalysis has been widely applied into organic synthesis for efficiently creating chiral functional molecules. In the past decades, chiral phase-transfer catalysts with proton donating groups are emerging as an extremely significant strategy in the design of novel catalysts, and a large number of enantioselective reactions have been developed. In particular, the proton donating groups including phenol, amide, and (thio)-urea exhibited unique properties for cooperating with the phase-transfer catalysts, and great advances on this field have been made in the past few years. This review summarizes the seminal works on the design, synthesis, and applications of chiral phase-transfer catalysts with strong hydrogen bonding interactions.
Collapse
|