D. Basavaiah et al., The Baylis-Hillman reaction: TiCl4 mediated coupling of alkyl vinyl ketones with alpha-keto esters and aldehydes, SYN COMMUN, 31(19), 2001, pp. 2987-2995
TiCl4 mediated coupling of alkyl vinyl ketones with a-keto esters and aldeh
ydes provides respectively 2-aryl-2-hydroxy-3-methylene-4-oxoalkanoates and
(Z)-keto allyl chlorides in 1 h time at room temperature. Similar coupling
of trifluoromethyl phenyl ketone with methyl vinyl ketone produces 1, 1, 1
trifluoro-2-hydroxy-2-phenyl-3-methylenepentan-4-one.