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Bayardon J, Qian C, Malacea-Kabbara R, Rousselin Y, Jugé S. Enantioselective Synthesis of P-Chirogenic 1,2,3-Triazolobenzophospholes. J Org Chem 2024; 89:11031-11042. [PMID: 39016213 DOI: 10.1021/acs.joc.4c01009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
An enantioselective synthesis of a new class of benzophosphole-based heterocycles bearing a fused triazole ring with enantioselectivities of ≤99% is reported. The key steps of the synthesis are based on an innovative stereospecific phosphinyl N → O migration of aminophosphine-boranes into phosphinites, followed by an intramolecular cyclization. Five X-ray structures of P-chirogenic triazolobenzophospholes and a gold(I) complex were established, for assigning absolute configurations, the stereochemistry of the reactions, and the placement of the triazole substituent at the syn position of the P center.
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Affiliation(s)
- Jérôme Bayardon
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), Université de Bourgogne (UMR-CNRS 6302), 9, av. A. Savary, 21078 Dijon, France
| | - Chen Qian
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), Université de Bourgogne (UMR-CNRS 6302), 9, av. A. Savary, 21078 Dijon, France
| | - Raluca Malacea-Kabbara
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), Université de Bourgogne (UMR-CNRS 6302), 9, av. A. Savary, 21078 Dijon, France
| | - Yoann Rousselin
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), Université de Bourgogne (UMR-CNRS 6302), 9, av. A. Savary, 21078 Dijon, France
| | - Sylvain Jugé
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), Université de Bourgogne (UMR-CNRS 6302), 9, av. A. Savary, 21078 Dijon, France
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Teng QH, Lu FL, Wang K, Zhou LY, Li DP. Chemodivergent Photocatalyzed Heterocyclization of Hydrazones and Isothiocyanates for the Selectivity Synthesis of 2-Amino-1,3,4-thiadiazoles and 1,2,4-Triazole-3-thiones. J Org Chem 2023. [PMID: 37141629 DOI: 10.1021/acs.joc.3c00320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A photocatalytic chemodivergent reaction for the selectivity formation of C-S and C-N bonds in a controlled manner was proposed. The reaction medium, either neutral or acidic, is critical to dictate the formation of 2-amino-1,3,4-thiadiazoles and 1,2,4-triazole-3-thiones from isothiocyanates and hydrazones. This is a practical protocol to achieve the chemoselectivity under mild and metal-free conditions.
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Affiliation(s)
- Qing-Hu Teng
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Feng-Lai Lu
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
| | - Kai Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Li-Ya Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Dian-Peng Li
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
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Xing M, Cui H, Zhang C. Nickel-Catalyzed Reductive Cross-Coupling of Alkyl Bromides and Chlorosilanes. Org Lett 2021; 23:7645-7649. [PMID: 34551258 DOI: 10.1021/acs.orglett.1c02887] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel nickel-catalyzed highly selective reductive cross-coupling of alkyl bromides and chlorosilanes to construct the C-Si bond has been developed. Under benign reaction conditions, a series of structurally interesting organosilanes can be accessed without Ni-catalyzed isomerization. The utility of this chemistry is illustrated by further transformations of the product. Moreover, the radical mechanism of the reaction is illustrated by control experiments.
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Affiliation(s)
- Mimi Xing
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Huanhuan Cui
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China
| | - Chun Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Road 92, Tianjin 300072, China.,Zhejiang Institute of Tianjin University, Ningbo, Zhejiang 315201, China
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