Enantioselective Synthesis of 2-Bromomethyl Indolines via BINAP(S)-Catalyzed Bromoaminocyclization of Allyl Aniline
作者:Sheng-Nan Yu、Yin-Long Li、Jun Deng
DOI:10.1002/adsc.201700106
日期:2017.7.17
An enantioselective bromoamination of allyl aniline with N‐bromosuccinimide (NBS) catalyzed by BINAP(S) (BINAP monosulfide) is described. This protocol could provide a range of chiral 2‐bromomethyl indolines in good to excellent yields with up to 87% ee. Furthermore, the resulting chiral 2‐bromomethyl indolines could be easily converted into synthetically useful chiral building blocks.
描述了由BINAP(S)(BINAP一硫化物)催化的N-溴代琥珀酰亚胺(NBS)对烯丙基苯胺的对映选择性溴化。该方案可以提供一系列手性2-溴甲基吲哚啉,其收率好至极好,ee最高可达87%。此外,所得的手性2-溴甲基吲哚啉可以轻松转化为合成有用的手性结构单元。