Goes on twice! The first enantioselectivedouble aldol reaction is described (see scheme; R1=aryl, alkyl, alkenyl; R2=aryl, alkenyl). A combination of readily available chiral phosphine oxide and silicon tetrachloride as reagents enables the unique transformation, which gives the double aldol adducts in high yields and selectivities.
继续两次!描述了第一对映选择性双羟醛反应(参见方案; R 1=芳基,烷基,烯基; R 2=芳基,烯基)。易于获得的手性氧化膦与四氯化硅的组合使用可实现独特的转化,从而以高收率和选择性获得双羟醛加合物。