Chiral BOX-Cu(OTf)2 catalyzed enantioselective aminolactonization of the tert-butyl ester of alkenoic acids has been developed via in situ aziridination using PhINNs as the nitrene source. It provides exclusively trans-gamma- and delta-amino lactones including an additional all-carbon quaternary stereo-centre with up to 98% ee in good to excellent yields.
通过使用PhINNs作为腈源的原位
叠氮化,开发了烯属酸叔丁酯的手性BOX-Cu(OTf)2催化对映选择性
氨基内酯化反应。它仅提供反式γ-和δ-
氨基内酯,包括一个额外的全碳四元立体中心,ee高达98%,收率好至极好。