S. Gueugnot et G. Linstrumelle, AN EFFICIENT PALLADIUM-CATALYZED REACTION OF PROPARGYL HALIDES, TOSYLATES AND ACETATES WITH TERMINAL ALKYNES, Tetrahedron letters, 34(24), 1993, pp. 3853-3856
In the presence of palladium complexes and copper iodide, the reaction
of propargyl halides with terminal alkynes proceeds rapidly to give c
onjugated allenynes in high yield. Propargyl acetates and tosylates ar
e also suited to the preparation of such allenes.