Polar phosphonic acid-derived Ru-BINAP systems were used to catalyze asymmetric hydrogenation of β-keto esters in room temperature ionic liquids (RTILs) with complete conversions and ee values higher than those obtained from homogeneous reactions in MeOH (up to 99.3%), and were recycled by simple extraction and used for four times without the loss of activity and enantioselectivity.
极性
磷酸衍生的Ru-BINAP体系用于在常温
离子液体(RTILs)中催化β-
酮酯的不对称氢化,获得了完全转化率和比在
甲醇中均相反应得到的更高的ee值(高达99.3%),并通过简单提取回收,循环使用了四次,未损失活性和选择性。