Cyclic β-ketoesters 1 undergo, in a one-pot process, an unprecedented DBUâMeOH promoted selective γ-arylidenation with aldehydes 2, by a directed γ-aldol reaction and dehydration sequence, to afford stereoselectively synthetically valuable cycloalkenones 3 in good yields.
通过定向δ-醛醇反应和脱
水顺序,环状δ-
酮酯 1 与醛 2 发生了前所未有的
DBUâMeOH 促进的选择性δ-
酰亚胺化反应,从而以良好的收率获得了具有立体选择性价值的环烯酮 3。