Catalytic Dimerization of Alkynes via C–H Bond Cleavage by a Platinum–Silylene Complex

Abstract

The cyclodimerization of diphenylacetylene derivatives catalyzed by a platinum–silylene complex is reported. The reaction proceeds via the cleavage of a carbon–hydrogen bond at the position ortho to an alkynyl group, and no additives are needed. Platinum complexes bearing other common ligands, such as phosphines and NHCs, failed to promote this reaction, highlighting the utility of the silylene ligand in this reaction.