A general method for the synthesis of heterocyclic dithiocarboxylate betaines: potential precursors of NHC based on a novel type of functionalization of the methyl group

Abstract

A more general, non-carbene route to heterocyclic dithiocarboxylate betaines was developed based on a novel type of functionalization of the C-methyl group of heterocyclic quaternary salts under the action of sulfur. These types of betaines are of interest as possible precursors for N-heterocyclic carbenes and metal complex catalysts