<i>gem</i>‐Selective Cross‐Dimerization and Cross‐Trimerization of Alkynes with Silylacetylenes Promoted by a Rhodium–Pyridine–<i>N</i>‐Heterocyclic Carbene Catalyst

Abstract

Abstract The gem‐ selective cross‐dimerization and ‐trimerization of silylacetylenes with alkynes through CH activation using a rhodium(I)–pyridine– N ‐heterocyclic carbene catalyst have been developed. This reaction is applied to various aliphatic or aromatic terminal alkynes, internal alkynes, and gem ‐1,3‐disubsituted enynes to afford the corresponding enynes and dienynes with high regio‐ and stereoselectivities and in good isolated yields (up to 91 %).