L. Liao et D. Villemin, A rapid and efficient one-pot synthesis of substituted 2-(5 H)-furanones under focused microwave irradiations, J CHEM R-S, (4), 2000, pp. 179-181
3-Hydroxy-3-methyl-2-butanone 1 reacted with ethyl cyanocetate in 2 in the
presence of sodium ethoxide under focused microwave irradiations to afford
3-cyano-4,5,5-trimethyl-2-(5H)-furanone 3. Furanone 3 then condensed with a
romatic or heteroaromatic aldehydes 4a-h to produce 3-cyano-4-(trans-aryl-v
inyl)-5,5-dimethyl-2-(5H)-furanones 5a-h in high overall yields (71-88%).