Transition-Metal-Free Tandem Cyclization/<i>N</i>-Arylation Reaction: A Method To Access Biaryl Sultam Derivatives via a Diradical Pathway
作者:Vijaykumar H. Thorat、Jen-Chieh Hsieh、Chien-Hong Cheng
DOI:10.1021/acs.orglett.0c02393
日期:2020.8.21
This reaction goes through the intramolecular homolytic cyclization to generate an N–H biaryl sultam intermediate, which enables aryne insertion to access diversely functionalized biaryl sultam derivatives with high yields. The mechanism study indicates that homolytic cyclization is executed by a diradical species, initiated from the thermal decomposition of 1,2,3,4-benzothiatriazine-1,1-dioxide to release
报道了一种新的芳烃与1,2,3,4-苯并噻三嗪-1,1-二氧化物的无过渡金属串联环化/ N-芳基化反应序列的程序。该反应通过分子内均质环化反应生成N–H联芳基杜仲中间体,这使得芳烃插入可以以高收率获得各种官能化的联芳基杜仲衍生物。机理研究表明,均相环化是由双自由基物质执行的,该自由基是由1,2,3,4-苯并噻三嗪-1,1-二氧化物的热分解引发的,从而释放出氮分子。