Mechanistic Insights into the Palladium-Catalyzed Domino Synthesis of 10,11-Dihydro-5<i>H</i>-dibenzo[<i>b</i>,<i>e</i>][1,4]diazepines
作者:Joydev K. Laha、K. S. Satyanarayana Tummalapalli、Ankur Gupta
DOI:10.1002/ejoc.201402207
日期:2014.8
A palladium-catalyzed domino approach to the synthesis of 10,11-dihydro-5H-dibenzo[b,e][1,4]diazepines starting from o-phenylenediamines and 2-bromobenzyl bromides or tosylates has been developed. Mechanistic studies support the following domino sequence. Intermolecular mono-N-benzylation of the o-phenylenediamine through oxidative palladium insertion, primarily at the benzylic position of the 2-bromobenzyl