M. Yoshimatsu et al., A NOVEL SYNTHESIS OF (Z)-ENYNES AND (Z)-ENEDIYNES FROM PROP-2-YNYL ALCOHOLS, Journal of the Chemical Society, Chemical Communications, (18), 1994, pp. 2107-2108
The conjugated (Z)-enynes 2a, 2d-g a nd (Z)-enediynes 2h-j were synthe
sized by dehydration of prop-2-ynyl alcohols 1a, 1d-j with polyphospho
ric acid trimethysilyl ester.