Charge transfer complex enabled mechanochemical synthesis of chalcogenoacetylenes via alkynyl radicals

Abstract

Mechanochemistry has become an appealing strategy to enable numerous organic transformations. While significant advancements have been achieved, radical coupling reactions under mechanochemical conditions are still in their infancy. In this study, a charge transfer complex enabled mechanochemical generation of alkynyl radicals from alkynyl sulfonium salts is reported. This method provides a convenient pathway to achieve alkynyl selenides and alkynyl tellurides under much simpler conditions, without inert gas protection.