Electrochemical synthesis of sulfonyl fluorides from sulfonyl hydrazides

Abstract

The synthesis of sulfonyl fluorides via the reaction of sulfonyl hydrazides and Et₃N·3HF under electrochemical conditions is reported. Various sulfonyl fluorides were obtained in good yields under a constant current of 15 mA for 10 h in CH₂Cl₂/DMSO. It was found that n-Bu₄NI acts as an electrolyte and a redox catalyst to produce sulfonyl radical species from sulfonyl hydrazides.