金鸡纳碱衍生的季铵盐催化二苯亚甲基甘氨酸叔丁酯与α,β不饱和酮的不对称Michael加成反应,常温条件下取得99%的产率,达到57%的对映选择性以及高于20∶1的区域选择性.合成了7个未见文献报道的取代的甘氨酸衍生物,其结构得到1H NMR确证.
The asymmetric Michael addition reaction of N-(benzophenone) glycine tert-butyl ester with α,β-Unsaturated Ketones catalyticed by cinchona-derived quaternary ammonium salts afforded 99% yield and 57% enantioselectivity with up to 20:1 regioselectivity in room temperature.we synthesized seven substituted glycine derivatives which have not been reported.All the structures have been characterized by 1H NMR and some by 13C NMR.