Abstract Michael addition of allylsilane to α-nitro olefin in the presence of AlCl 3 proceeded smoothly at low temperature to give unsaturated nitronic acid, which was converted into the γδ-enone using aqueous Ti (III). Transformation with the latter provided a convenient new synthesis of cyclopentenone.
[Clark, James H.; Cork, David G.; Gibbs, Hugh W. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1983 , p. 2253 - 2258]
