Terminal 1-halo- and 1-pseudohalo-1-alkynes via bis(trimethylsiyl)peroxide (BTMSPO) promoted umpolung transfer of halides and pseudohalides

Reaction of terminal acetylenes with read@ available and imensive copper and zinc halides and pseudo-halides and BTMSPO has been found to be an effective and general route for obtaining, in the absence of bases and under mild conditions, I-halo- and I-pseudohalo-I-alkynes in generally good yields