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Begum Z, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Tokiwa S, Takeshita M, Nakano H. New boro amino amide organocatalysts for asymmetric cross aldol reaction of ketones with carbonyl compounds. RSC Adv 2023; 13:888-894. [PMID: 36686933 PMCID: PMC9811241 DOI: 10.1039/d2ra06272k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/20/2022] [Indexed: 01/05/2023] Open
Abstract
Distinct types of new boron fused primary amino amide organocatalysts were designed and synthesized from commercially available amino acids. Their catalytic activities were investigated in asymmetric crossed aldol reaction of ketones with aromatic aldehydes to afford the corresponding chiral anti-aldol adducts with good chemical yields, moderate diastereoselectivity and good to excellent enantioselectivities (up to 94% yields, up to 90 : 10 dr, up to 94% ee).
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Affiliation(s)
- Zubeda Begum
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Yuko Okuyama
- Tohoku Medical and Pharmaceutical University4-4-1 Komatsushima, Aoba-KuSendai 981-8558Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Sciences, Tohoku University6-3 Aoba, Aramaki, Aoba-KuSendai 980-8578Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Michio Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | - Suguru Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | | | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
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2
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Li CY, Xiang M, Li WS, Zhang J, Zou Y, Wan WJ, Wang LX. Enantioselective Organocatalyzed Mannich Reaction between Benzothiazolimines and α‐Benzylidene Succinimides for the Preparation of Chiral Benzothiazol Succinimides. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chen-Yi Li
- Chengdu Institute of Organic Chemistry Chinese Academy of Sciences: Chengdu Organic Chemicals Co Ltd Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province CHINA
| | - Min Xiang
- Chengdu Institute of Organic Chemistry Chinese Academy of Sciences: Chengdu Organic Chemicals Co Ltd Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province CHINA
| | - Wen-Sheng Li
- Chengdu Institute of Organic Chemistry Chinese Academy of Sciences: Chengdu Organic Chemicals Co Ltd Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province CHINA
| | - Jian Zhang
- Chengdu Institute of Organic Chemistry Chinese Academy of Sciences: Chengdu Organic Chemicals Co Ltd Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province CHINA
| | - Ying Zou
- Chengdu Institute of Organic Chemistry Chinese Academy of Sciences: Chengdu Organic Chemicals Co Ltd Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province CHINA
| | - Wen-Juan Wan
- Chengdu Institute of Organic Chemistry Chinese Academy of Sciences: Chengdu Organic Chemicals Co Ltd Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province CHINA
| | - Li-Xin Wang
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province No.9 Section 4,Renmin Nan Road,Chengdu, 610041 Chengdu CHINA
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3
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Nakano H, Ganesan D, Parasuraman P, Begum Z, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Tokiwa S, Takeshita M, Thiyagarajan R. New Sugar Based γ-Amino Silyl Ether Organocatalysts for Asymmetric Michael Addition of β-Keto Esters with Nitroolefins. HETEROCYCLES 2022. [DOI: 10.3987/com-21-s(r)2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Li CY, Xiang M, Zhang J, Li WS, Zou Y, Tian F, Wang LX. Organocatalytic enantioselective aza-Friedel-Crafts reaction between benzothiazolimines and 2-naphthols for the preparation of chiral 2'-aminobenzothiazolomethyl naphthols. Org Biomol Chem 2021; 19:7690-7694. [PMID: 34524340 DOI: 10.1039/d1ob01443a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bifunctional cinchona squaramide catalyzed enantioselective aza-Friedel-Crafts reaction between 2-naphthols and benzothiazolimines has been developed, and a series of chiral 2'-aminobenzothiazolomethyl naphthols with potential antiproliferative and anthelmintic activities have been successfully and effectively prepared in good to excellent yields (up to 98%) with excellent enantioselectivities (up to >99% ee) even in a scale-up preparation under mild conditions.
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Affiliation(s)
- Chen-Yi Li
- Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China. .,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Min Xiang
- Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China. .,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Jian Zhang
- Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China. .,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Wen-Sheng Li
- Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China. .,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Ying Zou
- Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China. .,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Fang Tian
- Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.
| | - Li-Xin Wang
- Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.
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5
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Bagheri I, Mohammadi L, Zadsirjan V, Heravi MM. Organocatalyzed Asymmetric Mannich Reaction: An Update. ChemistrySelect 2021. [DOI: 10.1002/slct.202003034] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ilnaz Bagheri
- Department of Chemistry School of Science Alzahra University PO. Box 1993891176, Vanak Tehran Iran
| | - Leila Mohammadi
- Department of Chemistry School of Science Alzahra University PO. Box 1993891176, Vanak Tehran Iran
| | - Vahideh Zadsirjan
- Department of Chemistry School of Science Alzahra University PO. Box 1993891176, Vanak Tehran Iran
| | - Majid M. Heravi
- Department of Chemistry School of Science Alzahra University PO. Box 1993891176, Vanak Tehran Iran
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6
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Aydin AE, Culha S. Enantioselective conjugate addition of pyrazolones to nitroalkenes catalyzed by chiral squaramide organocatalyst. Chirality 2021; 33:106-114. [PMID: 33428800 DOI: 10.1002/chir.23295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 12/07/2020] [Accepted: 12/28/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Alime Ebru Aydin
- Department of Chemistry, Mustafa Kemal University, Antakya, Hatay, Turkey
| | - Selda Culha
- Department of Chemistry, Mustafa Kemal University, Antakya, Hatay, Turkey
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7
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Begum Z, Sannabe H, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Tokiwa S, Takeshita M, Nakano H. Simple primary β-amino alcohols as organocatalysts for the asymmetric Michael addition of β-keto esters to nitroalkenes. RSC Adv 2020; 11:203-209. [PMID: 35423042 PMCID: PMC8690173 DOI: 10.1039/d0ra09041g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/03/2020] [Indexed: 11/21/2022] Open
Abstract
Simple primary β-amino alcohols act as an efficient organocatalysts in the asymmetric Michael addition of β-keto esters with nitroalkenes affording highly pure chiral Michael adducts. Also, both enantiomers of the adducts were obtained, depending on the specific catalyst used and reaction temperature.
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Affiliation(s)
- Zubeda Begum
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585
| | - Haruka Sannabe
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585
| | - Yuko Okuyama
- Tohoku Medical and Pharmaceutical University 4-4-1 Komatsushima, Aoba-Ku Sendai 981-8558 Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Sciences, Tohoku University 6-3 Aoba, Aramaki, Aoba-Ku Sendai 980-8578 Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585
| | - Michio Tokiwa
- Tokiwakai Group 62 Numajiri Tsuduri-Chou Uchigo Iwaki 973-8053 Japan
| | - Suguru Tokiwa
- Tokiwakai Group 62 Numajiri Tsuduri-Chou Uchigo Iwaki 973-8053 Japan
| | | | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585
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8
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Affiliation(s)
- Xi‐Qiang Hou
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Da‐Ming Du
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
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9
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Togashi R, Chennapuram M, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Takeshita M, Nakano H. 2-Azanorbornane-Based Amino Alcohol Organocatalysts for Asymmetric Michael Reaction of β-Keto Esters with Nitroolefins. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900308] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Rei Togashi
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology.; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Madhu Chennapuram
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology.; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Chigusa Seki
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology.; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Yuko Okuyama
- Graduate School of Engineering; Tohoku Medicinal and Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8585 Sendai Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules; Graduate School of Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku 980-8578 Sendai Japan
| | - Koji Uwai
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology.; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Michio Tokiwa
- Graduate School of Sciences; Tokiwakai Group; 62 Numajiri Tsuduri-chou Uchigo 973-8053 Iwaki Japan
| | - Mitsuhiro Takeshita
- Graduate School of Sciences; Tokiwakai Group; 62 Numajiri Tsuduri-chou Uchigo 973-8053 Iwaki Japan
| | - Hiroto Nakano
- Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology.; 27-1 Mizumoto 050-8585 Muroran Japan
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10
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11
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Bai S, Liu S, Zhu Y, Wu Q. Asymmetric synthesis and antiviral activity of novel chiral amino-pyrimidine derivatives. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Ullah M, Itsuno S. Cinchona Squaramide-Based Chiral Polymers as Highly Efficient Catalysts in Asymmetric Michael Addition Reaction. ACS OMEGA 2018; 3:4573-4582. [PMID: 31458680 PMCID: PMC6641636 DOI: 10.1021/acsomega.8b00398] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 04/18/2018] [Indexed: 05/03/2023]
Abstract
We have synthesized novel chiral polymers containing a cinchona-based squaramide in the main chain. We designed a novel cinchona squaramide dimer that contains two cinchona squaramide units connected by diamines. The olefinic double bonds in the cinchona squaramide dimer were used for Mizoroki-Heck (MH) polymerization with aromatic diiodides. The MH polymerization of the cinchona squaramide dimer and aromatic diiodide proceeded well to give the corresponding chiral polymers in good yields. The catalytic activity of the chiral polymers was investigated for asymmetric Michael addition reactions. The effect of the squaramide structure of the polymeric catalyst on the catalytic performance is discussed in detail. We have surveyed the influence of the chiral polymer structure on the catalytic activity and enantioselectivity of the asymmetric reaction. The asymmetric Michael addition of β-ketoesters to nitroolefins was successfully catalyzed by polymeric cinchona squaramide organocatalysts to obtain the corresponding Michael adducts in good yields with excellent enantio- and diastereoselectivities. The polymeric catalysts were insoluble in commonly used organic solvents and easily recovered from the reaction mixture and reused several times without the loss of catalytic activity.
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13
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İşibol D, Karahan S, Tanyeli C. Asymmetric organocatalytic direct Mannich reaction of acetylacetone and isatin derived ketimines: Low catalyst loading in chiral cinchona-squaramides. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.081] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Bai S, Wu Q, Zhu Y, Liu S, Wei X, Zhao K, Li W. Cinchona Alkaloid Thiourea-Catalyzed One-Pot Synthesis and Bioselective Activities of β-Amino Acid Ester Derivatives Containing a Pyrimidine Moiety. HETEROCYCLES 2018. [DOI: 10.3987/com-18-13918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Wang P, Gao Y, Zhao Y, Liu W, Wang Y. Unveiling Mechanism of a Quinine-Squaramide Catalyzed Enantioselective Aza-Friedel–Crafts Reaction between Cyclic Trifluoromethyl Ketimine and Naphthol: A DFT Study. J Org Chem 2017; 82:13109-13114. [DOI: 10.1021/acs.joc.7b02168] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ping Wang
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yun Gao
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yang Zhao
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Wei Liu
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yong Wang
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
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16
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Ullah MS, Itsuno S. Synthesis of cinchona alkaloid squaramide polymers as bifunctional chiral organocatalysts for the enantioselective michael addition of β-ketoesters to nitroolefins. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.06.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Zhao B, Li J, Du D. Squaramide‐Catalyzed Asymmetric Reactions. CHEM REC 2017; 17:994-1018. [DOI: 10.1002/tcr.201600140] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 02/27/2017] [Indexed: 01/10/2023]
Affiliation(s)
- Bo‐Liang Zhao
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology 5 South Zhongguancun Street Beijing 100081 People's Republic of China
| | - Jun‐Hua Li
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology 5 South Zhongguancun Street Beijing 100081 People's Republic of China
| | - Da‐Ming Du
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology 5 South Zhongguancun Street Beijing 100081 People's Republic of China
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18
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Karahan S, Tanyeli C. Organocatalytic enantioselective construction of isatin-derived N-alkoxycarbonyl 1,3-aminonaphthols via sterically encumbered hydrocarbon-substituted quinine-based squaramide. NEW J CHEM 2017. [DOI: 10.1039/c7nj01395g] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
2-Adamantyl substituted quinine-squaramide catalyzed aza-Friedel–Crafts reaction of N-carbamate isatin ketimines with naphthol afforded chiral isatin-derived 1,3-aminonaphthols with excellent enantioselectivity up to greater than 99% and quantitative yield.
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Affiliation(s)
- Seda Karahan
- Department of Chemistry
- Middle East Technical University
- Ankara
- Turkey
| | - Cihangir Tanyeli
- Department of Chemistry
- Middle East Technical University
- Ankara
- Turkey
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19
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Guang J, Rout S, Bihani M, Larson AJ, Arman HD, Zhao JCG. Organocatalyzed Enantioselective Direct Mannich Reaction of α-Styrylacetates. Org Lett 2016; 18:2648-51. [DOI: 10.1021/acs.orglett.6b01087] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jie Guang
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Saroj Rout
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Manisha Bihani
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Ariel J. Larson
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Hadi D. Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - John C.-G. Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
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20
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Han X, Zhou HB, Dong C. Applications of Chiral Squaramides: From Asymmetric Organocatalysis to Biologically Active Compounds. CHEM REC 2016; 16:897-906. [DOI: 10.1002/tcr.201500266] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Xin Han
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Hai-Bing Zhou
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Chune Dong
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences; Shanghai 200032 P. R. China
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21
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Yang K, Jiang M, Liu JT. Synthesis of Chiral β-Aminomalonates from 2-Chlorotetrafluoroethanesulfinyl Aldimines through the Mannich Reaction. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Chauhan P, Mahajan S, Kaya U, Hack D, Enders D. Bifunctional Amine-Squaramides: Powerful Hydrogen-Bonding Organocatalysts for Asymmetric Domino/Cascade Reactions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401003] [Citation(s) in RCA: 412] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Varga E, Mika LT, Csámpai A, Holczbauer T, Kardos G, Soós T. Mechanistic investigations of a bifunctional squaramide organocatalyst in asymmetric Michael reaction and observation of stereoselective retro-Michael reaction. RSC Adv 2015. [DOI: 10.1039/c5ra19593d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The mechanism of cinchona–squaramide organocatalytic Michael addition was studied usingin situIR and NMR experiments. As a result, not only kinetic parameters were determined but a stereoselective retro-Michael reaction was also observed.
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Affiliation(s)
- Eszter Varga
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - László Tamás Mika
- Budapest University of Technology and Economics
- Faculty of Chemical Technology and Biotechnology
- Department of Chemical and Environmental Process Engineering
- Budapest
- Hungary
| | - Antal Csámpai
- Institute of Chemistry
- Eötvös Loránd University
- Budapest
- Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - György Kardos
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - Tibor Soós
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
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24
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He HX, Du DM. Organocatalytic Enantioselective Strecker Reaction of Imines Containing a Thiazole Moiety by Using a Cinchona-Based Squaramide Catalyst. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402764] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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25
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He HX, Du DM. Highly enantioselective Mannich reactions of imines with tert-butyl acetoacetate catalyzed by squaramide organocatalyst. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.03.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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26
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Affiliation(s)
- Xiang Ni
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Xin Li
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Zhen Wang
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Jin-Pei Cheng
- State Key
Laboratory of Elemento-Organic
Chemistry, Department of Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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27
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Wang XB, Li TZ, Sha F, Wu XY. Enantioselective Squaramide-Catalysed Domino Mannich-Cyclization Reaction of Isatin Imines. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301350] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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