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Guo CY, Chen JZ, Liu WT, Mei H, Meng J, Chen JP. Organocatalytic enantioselective decarboxylative protonation of α-alkyl-α-aryl malonate monoesters. Chem Commun (Camb) 2024; 60:3854-3857. [PMID: 38497353 DOI: 10.1039/d3cc06018g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
In contrast to the well-established enzymatic enantioselective decarboxylative protonation (EDP), the corresponding chemocatalytic reactions of acyclic malonic acid derivatives remain challenging. Herein, we developed a biomimetic EDP of α-alkyl-α-aryl malonate monoesters using a chiral 1,2-trans-diaminocyclohexane-based N-sulfonamide as an organocatalyst. The method demonstrates excellent chemical yields, good enantioselectivity, mild reaction conditions, and the generation of only CO2 as waste.
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Affiliation(s)
- Cong-Ying Guo
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Jia-Zheng Chen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Wen-Ting Liu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Hao Mei
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Jie Meng
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Jian-Ping Chen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
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Liu ZJ, Ma ZW, Chen XP, Wang CC, Liu JT, Tao JC. Chiral tertiary amine-squaramide catalyzed highly enantioselective Michael addition of cyclic diketones to β,γ-unsaturated α-keto Esters. LETT ORG CHEM 2022. [DOI: 10.2174/1570178619666220314152530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
A novel tertiary amine squaramide has successfully developed and applied to catalyze the asymmetric Michael addition between cyclic diketones and β,γ-unsaturated α-ketoesters. The catalyst system performed well with a low catalyst loading of 1 mol% under mild reaction conditions. A series of synthetically and pharmaceutically useful chiral bicyclic compounds were obtained with both high yields (up to 97%) and excellent enantioselectivities (up to 97% ee).
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Affiliation(s)
- Zhi-Jing Liu
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, P. R. China
| | - Zhi-Wei Ma
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, P. R. China
| | - Xiao-Pei Chen
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, P. R. China
| | - Chuan-Chuan Wang
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, P. R. China
| | - Jun-Tao Liu
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, P. R. China
| | - Jing-Chao Tao
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
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Deng R, Han TJ, Gao X, Yang YF, Mei GJ. Further developments of β,γ-unsaturated α-ketoesters as versatile synthons in asymmetric catalysis. iScience 2022; 25:103913. [PMID: 35243262 PMCID: PMC8881726 DOI: 10.1016/j.isci.2022.103913] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Ma ZW, Wang CC, Lv QJ, Chen XP, Li AQ, Tao JC. Highly Enantioselective Michael Addition of Cyclic Diketones to β,γ-Unsaturated α-Keto Esters Catalyzed by Squaramide Organocatalyst. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0040-1719863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractA new tertiary amine-squaramide organocatalyst has been developed and applied to the asymmetric Michael addition of cyclic diketones to β,γ-unsaturated α-keto esters. The catalyst system performed well with a low catalyst loading of 1 mol% under mild reaction conditions. A series of synthetically and pharmaceutically useful chiral bicyclic compounds were obtained in high yields (up to 97%) with excellent enantioselectivities (up to 99 % ee). Furthermore, this catalytic system can be used efficiently in large-scale reactions with the yields and enantioselectivities being maintained.
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Affiliation(s)
- Zhi-Wei Ma
- Faculty of Science, Henan University of Animal Husbandry and Economy
| | - Chuan-Chuan Wang
- Faculty of Science, Henan University of Animal Husbandry and Economy
| | - Quan-Jian Lv
- Faculty of Science, Henan University of Animal Husbandry and Economy
| | - Xiao-Pei Chen
- Faculty of Science, Henan University of Animal Husbandry and Economy
| | - Ai-Qin Li
- Faculty of Science, Henan University of Animal Husbandry and Economy
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Ma Z, Chen X, Wang C, Wang J, Tao J, Lü Q. Chiral Squaramide Catalyzed Enantioselective Michael Addition of Cyclic 1,3-Diketones to β, γ-Unsaturated α-Keto Esters. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202111030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Efficacy of Selenourea Organocatalysts in Asymmetric Michael Reactions under Standard and Solvent-Free Conditions. Molecules 2021; 26:molecules26237303. [PMID: 34885885 PMCID: PMC8658871 DOI: 10.3390/molecules26237303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/18/2022] Open
Abstract
By varying the steric and electronic surroundings of the hydrogen-bonding motif, the novel chiral Cinchona-alkaloid based selenoureas were developed. Acting as bifunctional catalysts, they were applied in the Michael reactions of dithiomalonate and nitrostyrene providing chiral adducts with up to 96% ee. The asymmetric Michael–-hemiacetalization reaction of benzylidene pyruvate and dimedone, performed with the assistance of 5 mol% of selenoureas, furnished the product with up to 93% ee and excellent yields. The effectiveness of the new hydrogen-bond donors was also proved in solvent-free reactions under ball mill conditions, supporting the sustainability of the devised catalytic protocol.
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Nickel (II) coordination on cross-linked poly triazine-urea-sulfonamide grafted onto Mg-Al LDHs: As a green catalytic system for the synthesis of tetrazolo[1,5-a] pyrimidines. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121971] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Dajek M, Pruszczyńska A, Konieczny KA, Kowalczyk R. Cinchona Squaramide‐Catalyzed Intermolecular Desymmetrization of 1,3‐Diketones Leading to Chiral 1,4‐Dihydropyridines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000455] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Maciej Dajek
- Department of ChemistryWroclaw University of Science and Technology
| | | | | | - Rafał Kowalczyk
- Department of ChemistryWroclaw University of Science and Technology
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Mlostoń G, Celeda M, Jasiński M, Urbaniak K, Boratyński PJ, Schreiner PR, Heimgartner H. 2-Unsubstituted Imidazole N-Oxides as Novel Precursors of Chiral 3-Alkoxyimidazol-2-ylidenes Derived from trans-1,2-Diaminocyclohexane and Other Chiral Amino Compounds. Molecules 2019; 24:molecules24234398. [PMID: 31810181 PMCID: PMC6930529 DOI: 10.3390/molecules24234398] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 11/28/2022] Open
Abstract
‘Desymmetrization’ of trans-1,2-diaminocyclohexane by treatment with α,ω-dihalogenated alkylation reagents leads to mono-NH2 derivatives (‘primary-tertiary diamines’). Upon reaction with formaldehyde, these products formed monomeric formaldimines. Subsequently, reactions of the formaldimines with α-hydroxyiminoketones led to the corresponding 2-unsubstituted imidazole N-oxide derivatives, which were used here as new substrates for the in situ generation of chiral imidazol-2-ylidenes. Upon O-selective benzylation, new chiral imidazolium salts were obtained, which were deprotonated by treatment with triethylamine in the presence of elemental sulfur. Under these conditions, the intermediate imidazol-2-ylidenes were trapped by elemental sulfur, yielding the corresponding chiral non-enolizable imidazole-2-thiones in good yields. Analogous reaction sequences, starting with imidazole N-oxides derived from enantiopure primary amines, amino alcohols, and amino acids, leading to the corresponding 3-alkoxyimidazole-2-thiones were also studied.
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Affiliation(s)
- Grzegorz Mlostoń
- Department of Organic and Applied Chemistry, University of Łódź, Tamka 12, PL-91-403 Łódź, Poland; (M.C.); (M.J.); (K.U.)
- Correspondence: ; Tel.: +48-42-6355761
| | - Małgorzata Celeda
- Department of Organic and Applied Chemistry, University of Łódź, Tamka 12, PL-91-403 Łódź, Poland; (M.C.); (M.J.); (K.U.)
| | - Marcin Jasiński
- Department of Organic and Applied Chemistry, University of Łódź, Tamka 12, PL-91-403 Łódź, Poland; (M.C.); (M.J.); (K.U.)
| | - Katarzyna Urbaniak
- Department of Organic and Applied Chemistry, University of Łódź, Tamka 12, PL-91-403 Łódź, Poland; (M.C.); (M.J.); (K.U.)
| | - Przemysław J. Boratyński
- Department of Organic Chemistry, Wrocław University of Technology, Wyspiańskiego 27, PL-50-370 Wrocław, Poland;
| | - Peter R. Schreiner
- Justus Liebig University, Institute of Organic Chemistry, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany;
| | - Heinz Heimgartner
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland;
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