Cobalt(<scp>iii</scp>)-catalyzed redox-neutral [4+2]-annulation of <i>N</i>-chlorobenzamides/acrylamides with alkylidenecyclopropanes at room temperature
作者:Balu Ramesh、Masilamani Jeganmohan
DOI:10.1039/d1cc00654a
日期:——
An efficient synthesis of substituted 3,4-dihydroisoquinolinones through [4+2]-annulation of N-chlorobenzamides/acrylamides having a monodentate directing group with alkylidenecyclopropanes in the presence of a less expensive, highly abundant and air stable Co(III) catalyst via a C–H activation is demonstrated. In this reaction, the N–Cl bond of N-chlorobenzamide serves as an internal oxidant and thus
通过[4 + 2] -annulation取代的3,4- dihydroisoquinolinones的有效合成Ñ -chlorobenzamides /丙烯酰胺具有单齿在较不昂贵的,高丰度和空气稳定的Co(存在引导组alkylidenecyclopropanes III)催化剂通过演示了C–H激活。在该反应中,N-氯苯甲酰胺的N–Cl键用作内部氧化剂,因此避免使用外部金属氧化剂。3,4-二氢异喹啉酮衍生物已成功转化为高度有用的亚氨酰氯衍生物。氘标记和动力学同标记研究表明,C–H活化是该环化反应中一个决定速率的步骤。