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Yin L, Xu M, Wang Y, Xie H, Yuan Y, Wang C, Jiang YY, Li Y. Regioselective Synthesis of Tetrasubstituted Benzenes via Co-Catalyzed Cycloaddition of Alkynyl Ketones and 2-Acetylpyridines. J Org Chem 2021; 86:12158-12167. [PMID: 34376046 DOI: 10.1021/acs.joc.1c01496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A Co(II)-catalyzed cycloaddition reaction of alkynyl ketones and 2-acetylpyridines using 2,2'-bipyridine as the ligand has been developed. These reactions have been realized through Co-catalyzed reductive coupling of two molecules of 2-acetylpyridine followed by regioselective insertion of the alkynone. It is the first example of regioselective cyclotrimerization of one molecule of alkyne and two molecules of monoketone to polysubstituted benzene derivatives in good to excellent yields. A mechanism involving the formation of a cobaltacyclopentane via homocoupling of 2-acetylpyridines is proposed, and it is supported by the DFT calculations.
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Affiliation(s)
- Liqiang Yin
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Murong Xu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Ye Wang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Huihui Xie
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yang Yuan
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Chengyu Wang
- School of Chemistry and Chemical Engineering, Linyi University, Shuangling Road, Linyi, Shandong 276000, China
| | - Yuan-Ye Jiang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, People's Republic of China
| | - Yanzhong Li
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
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2
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Yamazaki T, Taketsugi M, Kawasaki-Takasuka T, Agou T, Kubota T. Construction of CF 3-Containing Quaternary Chiral Centers via Michael Addition Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takashi Yamazaki
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Masahito Taketsugi
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Tomoko Kawasaki-Takasuka
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Tomohiro Agou
- Department of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan
| | - Toshio Kubota
- Department of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan
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3
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Li J, Yu B, Lu Z. Chiral Imidazoline Ligands and Their Applications in
Metal‐Catalyzed
Asymmetric Synthesis
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000486] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jiajing Li
- Department of Chemistry, Zhejiang University Hangzhou Zhejiang 310058 China
| | - Bing Yu
- College of Chemistry, Zhengzhou University Zhengzhou Henan 450001 China
| | - Zhan Lu
- Department of Chemistry, Zhejiang University Hangzhou Zhejiang 310058 China
- College of Chemistry, Zhengzhou University Zhengzhou Henan 450001 China
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4
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Kondoh A, Terada M. Brønsted Base-Catalyzed Formal Reductive [3+2] Annulation of 4,4,4-Trifluorocrotonate and α-Iminoketones. Chemistry 2021; 27:585-588. [PMID: 32869872 DOI: 10.1002/chem.202002943] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/27/2020] [Indexed: 02/01/2023]
Abstract
A formal reductive [3+2] annulation of 4,4,4-trifluorocrotonate and α-iminoketones was developed under Brønsted base catalysis. A single phosphazene base efficiently catalyzes the one-pot tandem reaction involving two mechanistically different elementary processes, namely the chemoselective reduction of an imine moiety of α-iminoketones with thiols as the reductant and the subsequent intermolecular Michael addition of an enolate of α-aminoketones concomitant with lactam formation. This operationally simple method provides β-trifluoromethyl-substituted γ-lactams with a tetrasubstituted carbon as a single diastereomer.
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Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
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5
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Wang C, Zhang L, Li X, Yu A, Zhang S. Controlled fabrication of core-shell silica@chiral metal-organic framework for significant improvement chromatographic separation of enantiomers. Talanta 2020; 218:121155. [DOI: 10.1016/j.talanta.2020.121155] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 05/06/2020] [Accepted: 05/10/2020] [Indexed: 01/15/2023]
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6
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Palao E, López E, Torres-Moya I, de la Hoz A, Díaz-Ortiz Á, Alcázar J. Formation of quaternary carbons through cobalt-catalyzed C(sp 3)-C(sp 3) Negishi cross-coupling. Chem Commun (Camb) 2020; 56:8210-8213. [PMID: 32555891 DOI: 10.1039/d0cc02734k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Formation of all-carbon-substituted quaternary carbons is a key challenge in organic and medicinal chemistry. We report a cobalt-catalyzed C(sp3)-C(sp3) cross-coupling that allows for the introduction of benzyl, heteroarylmethylzinc and allyl groups to halo-carbonyl substrates. The cross-coupling reaction is selective for C(sp3)-over C(sp2)-halides, in contrast to most used catalytic metals, and allows access to novel scaffolds of pharmaceutical interest. NMR mechanistic studies suggest the presence of Co(0) complexes as catalytic species.
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Affiliation(s)
- Eduardo Palao
- Discovery Chemistry, Janssen Research and Development, Janssen-Cilag, S.A., C/Jarama 75A, Toledo, Spain.
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7
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Cheng X, Yan D, Dong X, Wang C. Chiral Trifluoromethylated Pyrrolidines via Cu–Catalyzed Asymmetric 1,3‐Dipolar Cycloaddition. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000295] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiang Cheng
- Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Dingce Yan
- Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
- Analytical and Testing Center Huazhong University of Science and Technology Wuhan 430072 China
| | - Xiu‐Qin Dong
- Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
| | - Chun‐Jiang Wang
- Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China
- State Key Laboratory of Elemento-organic Chemistry Nankai University Tianjin 300071 China
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8
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Zhu WJ, Gong JF, Song MP. Synthesis of Chiral Bis(3-indolyl)methanes Bearing a Trifluoromethylated All-Carbon Quaternary Stereocenter via Nickel-Catalyzed Asymmetric Friedel-Crafts Alkylation Reaction. J Org Chem 2020; 85:9525-9537. [PMID: 32628848 DOI: 10.1021/acs.joc.0c00336] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Bis(3-indolyl)methanes are well-known natural products with a broad range of important biological functions including cancer cell growth inhibition and antimicrobial activity. Incorporation of a trifluoromethyl group is known to have a profound effect on the parent compound's biological activities. Here, an efficient method for the synthesis of chiral trifluoromethylated bis(3-indolyl)methanes via a catalytic asymmetric Friedel-Crafts (F-C) alkylation reaction has been established. Both enantiomers of the catalysis products can be obtained by tuning the chiral substituents of the catalyst. With 5 mol % of the Ni(II)/(imidazoline-oxazoline) complex as the catalyst, the F-C reaction of indoles with β-CF3-β-(3-indolyl)nitroalkenes proceeded well to afford a series of chiral bis(3-indolyl)methanes bearing a trifluoromethylated all-carbon quaternary stereocenter in generally good yields with excellent enantioselectivities (up to 98% yield and 94% ee). Furthermore, by interchanging the indole moieties of the two reactants, indole vs β-CF3-β-(3-indolyl)nitroalkene in the F-C reaction, both enantiomers of a given trifluoromethylated bis(3-indolyl)methane were obtained with high enantioselectivities (89-94% ee) upon removal of the indole N-protecting group in the F-C products. The current work represents the first general catalytic enantioselective approach to the important class of trifluoromethylated bis(3-indolyl)methanes.
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Affiliation(s)
- Wen-Jing Zhu
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Jun-Fang Gong
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Mao-Ping Song
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People's Republic of China
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9
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Yang H, Wang Q, Luo Y, Ye L, Li X, Chen F, Zhao Z, Li X. Enantioselective synthesis of trifluoromethyl substituted cyclohexanones via an organocatalytic cascade Michael/aldol reaction. Org Biomol Chem 2020; 18:1607-1611. [PMID: 32030393 DOI: 10.1039/d0ob00004c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
An enantioselective (92-99% ee) Michael/aldol cascade reaction between 4,4,4-trifluoroacetoacetates and α,β-unsaturated enones was established in the presence of cinchona alkaloid-based primary amines. Various β-CF3-cyclohexanones were constructed in high yields (81-99%) as a couple of separable diastereomers. This tandem reaction was sensitive to acidic co-catalysts, with a Michael/aldol condensation process favorably occurring to generate β-CF3-cyclohexenones (42-69% yield, 84-96% ee) in the presence of trifluoroacetic acid.
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Affiliation(s)
- Hongzhou Yang
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Qingqing Wang
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Yuan Luo
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Ling Ye
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Xinying Li
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Feng Chen
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Zhigang Zhao
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Xuefeng Li
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
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10
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Hu WF, Zhao JQ, Chen XZ, Zhou MQ, Zhang XM, Xu XY, Yuan WC. Organocatalytic enantioselective sulfa-Michael addition of thiocarboxylic acids to β-trifluoromethyl-α,β-unsaturated ketones for the construction of stereogenic carbon center bearing a sulfur atom and a trifluoromethyl group. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.02.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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