M. Alami et al., AN EFFICIENT PALLADIUM-CATALYZED REACTION OF VINYL AND ARYL HALIDES OR TRIFLATES WITH TERMINAL ALKYNES, Tetrahedron letters, 34(40), 1993, pp. 6403-6406
In the presence of tetrakis(triphenylphosphine)palladium, vinyl and ar
yl halides or triflates react very rapidly in piperidine or pyrrolidin
e with terminal alkynes to give conjugated enynes and aryl acetylenes
in high yields.