Alkynyl(phenyl)iodonium tosylates react with mixed cuprates coordinated by alkynyl components to give unsymmetrical diacetylenes selectively; the coupling reaction with dialkylcuprates afforded substituted alkynes.
T. Kitamura, T. Tanaka, H. Taniguchi and P. J. Stang, J. Chem. Soc., Perkin Trans. 1, 1991, 2892 DOI: 10.1039/P19910002892
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