Silyl enolates that were generated from α-allyloxy esters afforded the corresponding [2,3]-Wittig rearrangement products in moderate to good yields on treatment with a catalytic amount of Lewis base such as tetrabutylammonium acetate or tetrabutylammonium 4-methoxybenzoate in DMF at room temperature.
在室温下,在
DMF中用催化量的路易斯碱(如四丁基
乙酸铵或四丁基4-甲氧基
苯甲酸铵)处理α-烯丙氧基酯生成的
硅烯醇化物,可获得相应[2,3]-Wittig重排产物,产率中等至良好。