Brønsted acid as organocatalyst. Various differently substituted phenylglycine derivatives can be synthesized in good to excellent yields and enantiomeric excesses based on a Friedel–Crafts alkylation of electron‐rich arenes with a glyoxylate imine. A novel protocol for the deprotection of the N‐tert‐butylsulfonyl (Bus) group has also been developed.
芳基甘
氨酸的对映选择性有机催化合成方法是使用1摩尔%的对映纯N-
三烯丙基
磷酰胺布朗斯台德酸作为有机催化剂。基于富电子
芳烃与
乙醛酸亚胺的Friedel-Crafts烷基化反应,可以合成各种不同取代的苯基甘
氨酸衍
生物,并获得良好至极佳的收率和对映体过量。用于脱保护的新型协议ñ -叔-butylsulfonyl(总线)基团也已经开发。