Visible-light-induced halocyclization of 2-alkynylthioanisoles with simple alkyl halides towards 3-halobenzo[ b ]thiophenes without an external photocatalyst.

Fen-Dou Wang, Chunmiao Wang,Min Wang, Han Yan, Jin Jiang,Pinhua Li

Organic & biomolecular chemistry(2023)

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摘要
A new strategy for the preparation of 3-halobenzo[]thiophenes a photo-driven halocyclization/demethylation of 2-alkynylthioanisoles with simple alkyl halides was developed. The reaction can proceed smoothly at room temperature under visible-light irradiation without any external photocatalyst, and the protocol has a range of advantages, including simplicity and mildness of the reaction conditions, good functional-group tolerance, and excellent yields of the products.
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关键词
halocyclization,simple alkyl halides,visible-light-induced visible-light-induced
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