R. Tapia et al., A SIMPLE SYNTHESIS OF ETHYL -(1,4-CYCLOHEXADIENE-3,6-DIONE-1-YL)-3,5-DIHYDROXY PENTANOATE, Synthetic communications, 24(11), 1994, pp. 1625-1630
Ethyl ohexadiene-3,6-dione-1-yl)-3,5-dihydroxypentanoate (9) has been
synthesized by using the reaction of 2,5-dimethoxybenzaldehyde(4) with
beta-ketoester dianions as the key step.