Recently we have been interested in a safe and convenient large scale syntheses of 1- ethynylcyclopentene (3), 1-hexen-4-yne (6) and 1-hexen-3-yne (9), to be utilized in long term storage safety tests. A literature search disclosed a synthesis of 31, 2 and two procedures of related enyne compounds on a 10-15 g. scale (0.1-0.2 mole^),^.^ no reliable syntheses of 6 and 9 were found. Compounds 3 and 6 have been now efficiently obtained ...
[Guirgis, Gamil A.; Zhu, Xiaodong; Heldrich, Frederick J.; Wright, Matthew J.; Durig, James R. Physical Chemistry Chemical Physics, 2003 , vol. 5, # 12 p. 2541 - 2551]
