Cobalt-catalyzed cross-coupling of alkynyl Grignard reagents with alkenyl triflates

Alkenyl triflates in combination with Co(acac)3 as a catalyst were found to be excellent coupling partners of alkynyl Grignard reagents, where no special additives (even a phosphine ligand) but a common solvent, THF, are required to obtain variously substituted enynes.