A Titanocene-Catalyzed Intramolecular Ene Reaction: Cycloisomerization of Enynes and Dienynes S. J. Sturla, Kablaoui, N. M. , and Buchwald, S. L. “A Titanocene-Catalyzed Intramolecular Ene Reaction: Cycloisomerization of Enynes and Dienynes”, J. Am. Chem. Soc., 1999, 121(9), 1976-1977.