Titanocene(II)-Promoted Olefination of ω,ω-Bis(phenylthio)alkyl Alkanoates. A New Method for the Preparation of ω-Hydroxy Ketones

Intramolecular olefination of esters having a thioacetal moiety was studied. The treatment of ω,ω-bis(phenylthio)alkyl alkanoates with Cp2Ti[P(OEt)3]2 and the following hydrolysis gave ω-hydroxy ketones in good yields.