A tunable and practical transformation of structurally diverse sulfonyl hydrazides
into thiosulfonates in the presence of Rongalite (NaHSO2·CH2O) was developed. Transition-metal-free conditions, operational simplicity, and readily
available reagents are the striking features of this protocol. It is the first example
for the synthesis of thiosulfonates using sulfonyl hydrazides with the assistance
of reductant. Additionally, the mechanistic studies revealed that this transformation
probably undergoes via a reducing–coupling pathway.
Key words
sulfonyl hydrazides - Rongalite - thiosulfonates - transition-metal-free - reductive
coupling