Alkenylboranes R-CHCH-B(C6F5)2 undergo carbon–carbon coupling by means of 1,1-alkenylboration with diarylphosphino-enynes to give conjugated hexatriene derivatives that bear a vicinal pair of B(C6F5)2 and PAr2 functionalities at the framework.
Terminal and internal alkynes are efficiently hydroborated to (