Direct Transition‐Metal‐Free Enantioselective Hydroxylation: Expeditious Access to 3‐Functionalized 3‐Hydroxy‐2‐oxindoles
作者:Shouqin Zhao、Wen Yang、Yunfei Lan、Yanteng Zhao、Yi Xu、Wanqing Liu、Linlin Wang、Xin Zhou、Changyan Yu、Ting Guo、Lujiang Yuan、Qianfa Jia、Qiao Ren
DOI:10.1002/ejoc.202301313
日期:2024.3.18
A direct transition-metal-free asymmetric hydroxylation using commercially available enantiopure Davis oxaziridine as an efficient oxidant is disclosed. An array of medicinally and optically active 3-aryl/alkyl-3-hydroxy-2-oxindoles with a tetrasubstituted stereocenter were obtained in good yields and enantioselectivities. The protocol features ease of operation, scalability, and good functional-group
公开了使用市售对映体纯戴维斯氧氮丙啶作为有效氧化剂的直接无过渡金属不对称羟基化。以良好的收率和对映选择性获得了一系列具有四取代立构中心的药用和光学活性 3-芳基/烷基-3-羟基-2-羟吲哚。该协议具有操作简便、可扩展性和良好的功能组容错性等特点。