Shet, J.B.; Amonkar, C.P.; Nadkarni, V.S.; Tilve, S.G.
(Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry. 44(7); 2005; 1505-1508.)
gamma-Methyl-alpha-(alkylidene substituted)-gamma-butyrolactones have been synthesized in two steps. The anion of allyl phosphonate 1 is condensed with different carbonyl compounds to afford alpha,beta-unsaturated esters ...