α-Lithio conjugated enyne sulfones, easily generated from enyne sulfones 1 and 2 and MeLi, upon reaction with carbonyl compounds followed by treatment with MeLi afford the 2,4-diynols 4a–g and 5a–c in high yields.
M. Yoshimatsu, M. Kawahigashi, H. Shimizu and T. Kataoka, J. Chem. Soc., Chem. Commun., 1995, 583 DOI: 10.1039/C39950000583
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