10.1021/om010755u.s002 Shana J. Sturla Shana J. Sturla Stephen L. Buchwald Stephen L. Buchwald Monocyclopentadienyltitanium Aryloxide Complexes:  Preparation, Characterization, and Application in Cyclization Reactions American Chemical Society 2002 Structural characterization enyne trisubstituted olefin Cyclization Reactions diene steric parameters titanium metallacycle monocyclopentadienyltitanium aryloxide complexes Pauson cyclization reactions 2002-01-24 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Monocyclopentadienyltitanium_Aryloxide_Complexes_Preparation_Characterization_and_Application_in_Cyclization_Reactions/3767448 A variety of monocyclopentadienyltitanium aryloxide complexes were prepared, characterized by X-ray crystallography, and used to catalyze or mediate cyclization reactions. Structural characterization allowed for the comparison of steric parameters of various 2,6-disubstituted aryloxide ligands. Transformations of dienes and enynesincluding the catalysis of a 1,6-diene cycloisomerization and the intramolecular Pauson−Khand reactionwere investigated. A titanium metallacycle was prepared from a sterically hindered enyne containing a trisubstituted olefin. The Pauson−Khand reaction of trimethylsilyl-substituted enynes was promoted to generate α-silylcyclopentenones.