Regioselective Hydrothiolation of Alkynes by Sulfonyl Hydrazides Using Organic Ionic Base–Brønsted Acid

A practical and novel approach has been developed for the synthesis of vinyl sulfides by the reaction of sulfonyl hydrazides with aryl/heteroarylacetylenes using a DBU-based ionic liquid. The system offers a new sulfur source for hydrothiolation and is endowed with green credentials