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Please login to access the full content or check if you have access via Method 4: (η1-Allyl)bis(η5-cyclopentadienyl)titanium(IV) Complexes by Reaction of ­Vinyl Halides, Vinyl Esters, or Carboxylic Esters with the Dichlorobis(η5-cyclopentadienyl)titanium(IV)–Trimethylaluminum Complex

DOI: 10.1055/sos-SD-002-00576

Mikami, K.; Matsumoto, Y.; Shiono, T.Science of Synthesis, (20032524.

Reaction of a dichlorobis(η5-cyclopentadienyl)titanium(IV) (78)/trimethylaluminum mixture (1:4) with vinyl halides or vinyl esters 139 and subsequent reaction with aldehydes affords homoallyl alcohols 141 via (η1-allyl)titanium complex 140 (Scheme 70). The formation of 140 is suggested to proceed via a titanacyclobutane, with subsequent elimination of the halogen or alkoxy group. The reaction of esters with 3 equivalents of [Ti(Cp)2Cl2] (78) and trimethylaluminum affords vinyl esters by Tebbe methylenation, followed by the formation of σ-allyltitanium complexes.[‌275‌]

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