Modular One-Step Three-Component Synthesis of Tetrahydroisoquinolines Using a Catellani Strategy
作者:Guangyin Qian、Miao Bai、Shijun Gao、Han Chen、Siwei Zhou、Hong-Gang Cheng、Wei Yan、Qianghui Zhou
DOI:10.1002/anie.201806780
日期:2018.8.20
Reported is a modular one‐step three‐component synthesis of tetrahydroisoquinolines using a Catellani strategy. This process exploits aziridines as the alkylating reagents, through palladium/norbornene cooperative catalysis, to enable a Catellani/Heck/aza‐Michael addition cascade. This mild, chemoselective, and scalable protocol has broad substrate scope (43 examples, up to 90 % yield). The most striking
报告的是使用Catellani策略的模块化一步法三组分合成四氢异喹啉。该过程通过钯/降冰片烯协同催化,利用氮丙啶作为烷基化试剂,从而实现Catellani / Heck / Aza-Michael加成级联反应。这种温和,化学选择性和可扩展的方案具有广泛的底物范围(43个实例,产率高达90%)。该方案最引人注目的功能是观察到的2-烷基和2-芳基取代的氮丙啶分别具有1,3-顺式取代和1,4-顺式取代的四氢异喹啉类的优异的区域选择性和非对映选择性。而且,这是具有高步骤和原子经济性的通用方法。