Scope and limitation of intramolecular Pauson–Khand reaction of fluorine-containing enynes

Intramolecular Pauson–Khand reaction of various fluorine-containing enynes was investigated under various conditions. The reaction of the substrates, which have fluorine atom(s) or fluorine-containing group(s) attached to alkenyl moiety, gave the corresponding cyclopentenones in low to moderate yield, while that of the substrates bearing fluorine-containing groups attached to alkynyl moiety afforded the corresponding cyclopentenones in low to high yield.