Cationic Ruthenium Catalysts for Alkyne Annulations with Oximes by C-H/N-O Functionalizations

Abstract

Cationic ruthenium(II) complexes enabled efficient redox-neutral annulations of alkynes with readily available oximes. The catalytic dehydrative C-H/N-O bond functionalization proved to be broadly applicable and was shown to proceed through a reversible cyclometalation.