Alkynyl sulfoxides as α-sulfinyl carbene equivalents: Gold-catalysed oxidative cyclopropanation

Abstract

Alkynyl sulfoxides are shown to act as α-sulfinyl metallocarbene synthons under oxidative gold catalysis, enabling reactions that are not available from diazo-precursors. This strategy is exemplified in the synthesis of fused α-sulfinyl cyclopropanes.