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Chem. Commun., 2009, 3533 - 3535, DOI: 10.1039/b905954g

TfOH-catalyzed intramolecular alkyne–ketone metathesis leading to highly substituted five-membered cyclic enones

Tienan Jin, Fan Yang, Chunli Liu and Yoshinori Yamamoto

The intramolecular carbocyclization of tethered alkynyl ketones to five-membered cyclic enones is shown to be catalyzed by trifluoromethanesulfonic acid in MeOH, proceeding in good to excellent yields and with high selectivities.

Graphical abstract image for this article (ID: b905954g)