Facile and clean synthesis of α-alkenoyl ketene-(S,S)-acetals via the aldol condensation reactions in water
作者:Yan Ouyang、Dewen Dong、Wei Pan、Jie Zhang、Qun Liu
DOI:10.1016/j.tet.2006.08.040
日期:2006.10
The aldol condensation reactions of α,α-diacetyl ketene-(S,S)-acetals, 1a and 1b, with aromatic aldehydes 2 in the presence of NaOH in water have been investigated. At room temperature, the base-mediated condensations proceed smoothly to afford the corresponding mono-condensed products, α-alkenoyl ketene-(S,S)-acetals 3, in high yields. At reflux temperature, the reactions produce high yields of symmetric