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Lead-free Cs3Bi2Br9 perovskite: A recoverable heterogeneous photocatalyst for the C3 arylation of quinoxalin-2(1H)-ones.

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Title: Lead-free Cs3Bi2Br9 perovskite: A recoverable heterogeneous photocatalyst for the C3 arylation of quinoxalin-2(1H)-ones.
Authors: Zhang, Shuai-Zheng1, Mo, Li-Ping1 moliping@hebtu.edu.cn, Zhang, Zhan-Hui1 zhanhui@hebtu.edu.cn
Source: Molecular Catalysis. Nov2024, Vol. 568, pN.PAG-N.PAG. 1p.
Subjects: Perovskite, Photocatalysts, Arylation, Quinoxalines, Phenylhydrazine
Abstract: • A lead-free perovskite Cs 3 Bi 2 Br 9 is employed as a photocatalyst. • Cs 3 Bi 2 Br 9 exhibits a high catalytic activity for visible-light-mediated C3 arylation of quinoxalin-2(1 H)-ones. • Various 3-arylquinoxalin-2(1 H)-one derivatives are obtained with high yields. • The reaction is performed in dimethyl carbonate with oxygen in air as oxidant at room temperature. • The catalytic system can be effectively operated in gram-scale, and the catalyst is stable and recyclable. A facile, practical and attractive approach has been developed for the C3 arylation of quinoxalin-2(1 H)-ones with phenylhydrazines using the lead-free perovskite Cs 3 Bi 2 Br 9 as heterogeneous photocatalyst. The reaction proceeded smoothly in dimethyl carbonate with oxygen in air as oxidant under light irradiation, furnishing 3-arylquinoxalin-2(1 H)-one derivatives in high yields. The developed recyclable system showed a broad substrate range, good functional group compatibility, mild conditions, photocatalyst recyclability, and gram-scale reactivity. [Display omitted] [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:• A lead-free perovskite Cs 3 Bi 2 Br 9 is employed as a photocatalyst. • Cs 3 Bi 2 Br 9 exhibits a high catalytic activity for visible-light-mediated C3 arylation of quinoxalin-2(1 H)-ones. • Various 3-arylquinoxalin-2(1 H)-one derivatives are obtained with high yields. • The reaction is performed in dimethyl carbonate with oxygen in air as oxidant at room temperature. • The catalytic system can be effectively operated in gram-scale, and the catalyst is stable and recyclable. A facile, practical and attractive approach has been developed for the C3 arylation of quinoxalin-2(1 H)-ones with phenylhydrazines using the lead-free perovskite Cs 3 Bi 2 Br 9 as heterogeneous photocatalyst. The reaction proceeded smoothly in dimethyl carbonate with oxygen in air as oxidant under light irradiation, furnishing 3-arylquinoxalin-2(1 H)-one derivatives in high yields. The developed recyclable system showed a broad substrate range, good functional group compatibility, mild conditions, photocatalyst recyclability, and gram-scale reactivity. [Display omitted] [ABSTRACT FROM AUTHOR]
ISSN:24688231
DOI:10.1016/j.mcat.2024.114514