Meier A, Badalov SV, Biktagirov T, Schmidt WG, Wilhelm R. Diquat Based Dyes: A New Class of Photoredox Catalysts and Their Use in Aerobic Thiocyanation.
Chemistry 2023;
29:e202203541. [PMID:
36700523 DOI:
10.1002/chem.202203541]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
A series of new organic donor-π-acceptor dyes incorporating a diquat moiety as a novel electron-acceptor unit have been synthesized and characterized. The analytical data were supported by DFT calculations. These dyes were explored in the aerobic thiocyanation of indoles and pyrroles. Here they showed a high photocatalytic activity under visible light, giving isolated yields of up to 97 %. In addition, the photocatalytic activity of standalone diquat and methyl viologen through formation of an electron donor acceptor complex is presented.
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