dicyclohexylphenylphosphine provides a useful catalyst system for the addition of boronic acids to 1,2-diketones and 1,2-ketoesters. The best yields were obtained when the transformation was performed in DME/H2O at 80 °C with 4 equiv of the boronic acid. The results discussed herein extend the scope of the addition of arylboronic acids to highly activated diketones and ketoesters. The products of the reaction
在二
环己基苯基膦的存在下,
金属络合物Rh(acac)(CO)2提供了有用的催化剂体系,用于将
硼酸加成到1,2-二酮和1,2-
酮酸酯中。当在80°C的
DME / H 2 O中加入4当量的
硼酸进行转化时,可获得最佳的收率。本文讨论的结果扩展了将芳基
硼酸添加到高度活化的二酮和
酮酸酯的范围。该反应的产物可用于合成在酯或酮之后含氧的
天然产物。