aromatic aldehydes undergoes crossed aldol condensation with ketones in the presence of a catalytic amount of Yb(OTf) 3 under solvent-free conditions to afford the corresponding α,α'-bis(substituted benzylidene)cycloalkanones in excellent yields without occurrence of any side reactions. This method is very general, simple and environmental friendly in contrast with the existing methods, which use many
在无溶剂条件下,在催化量的 Yb(OTf) 3 存在下,一系列芳香醛与酮发生交叉羟醛缩合反应,以优异的收率得到相应的 α,α'-双(取代亚苄基)环烷酮,而不会发生任何副反应。与使用许多经典
路易斯酸的现有方法相比,该方法非常通用、简单且环保。此外,催化剂可以方便地回收和有效地重复使用而不损失活性。