Manganese-Catalyzed Dehydrogenative [4+2] Annulation of NH Imines and Alkynes by CH/NH Activation
作者:Ruoyu He、Zhi-Tang Huang、Qi-Yu Zheng、Congyang Wang
DOI:10.1002/anie.201402575
日期:2014.5.5
Described herein is a manganese‐catalyzed dehydrogenative [4+2] annulation of NH imines and alkynes, a reaction providing highly atom‐economical access to diverse isoquinolines. This transformation represents the first example of manganese‐catalyzed CH activation of imines; the stoichiometric variant of the cyclomanganation was reported in 1971. The redox neutral reaction produces H2 as the major
本文中描述为N的锰催化脱氢[4 + 2]环 ħ亚胺和炔烃的反应提供高度原子经济获取各种异喹啉。这种转变代表了锰催化亚胺的CH活化的第一个例子。1971年报道了环锰的化学计量变体。氧化还原中性反应产生H 2作为主要副产物,消除了对任何氧化剂,外部配体或添加剂的需要,因此在过渡金属催化的C的已知异喹啉合成中脱颖而出。H激活。机理研究表明,五元锰环和氢化锰是催化循环中的关键反应中间体。