Chiral bifunctional tertiary amine thiourea was applied to catalyze the asymmetric hydroxyamination of 3-subsituted oxindoles with nitrosobenzene to construct 3-amino-2-oxindoles with quaternary stereocenters in good yields (up to 91%) and enantioselectivities (up to 90% ee).
应用手性双功能叔胺
硫脲催化 3-取代
吲哚与
亚硝基苯的不对称羟基化反应,以良好的产率(高达 91%)和对映选择性(高达 90% ee)构建出具有四元立体中心的 3-
氨基-2-
吲哚。