Abstract
A new approach for an efficient metal-free synthesis of 1,2,4-thiadiazoles from primary thioamides using visible light and air in the presence of eosin Y as a photoredox catalyst is reported. The protocol involves an aerobic oxidative cyclization of thioamides via the formation of C–N and C–S bonds to afford excellent yields of the products in a simple one-pot operation under mild conditions.
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