A. Arcadi et al., THE REACTION OF 5-MONOALKYL DERIVATIVES OF MELDRUM ACID WITH ALPHA,BETA-YNONES - A SIMPLE APPROACH TO SUBSTITUTED 2H-PYRAN-2-ONES, Synlett, (10), 1993, pp. 741-742
The reaction of 5-monoalkyl derivatives of Meldrum's acid with alpha,b
eta-ynones in the presence of potassium carbonate and tetrabutylammoni
um chloride produces substituted 2H-pyran-2-ones in moderate to good y
ield.