A Novel Route to Fulvene Complexes of Titanium-Diastereoselective Complexation of Pentafulvenes to Cyclopentadienyltitanium Fragments Fulvene Complexes of Early Transition Metals, Part 1. This work was supported by the Bayer AG, Leverkusen (J.H.), the Bundesministerium für Bildung und Forschung (J.S.,03C0276G/4), the Fonds der Chemischen Industrie, and the Karl-Ziegler-Stiftung of the GDCh.

An alternative to the known thermally induced syntheses of fulvene complexes of early transition metals is now provided by the direct reductive complexation of pentafulvenes to [CpTiCl] fragments. These generally highly diastereoselective reactions enable a broad variation of substitution patterns and establish an extensive subsequent chemistry.