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
已经开发了一种钯催化的多米诺方法,用于从邻苯二胺和 2-溴苄基溴或甲苯磺酸盐开始合成 10,11-二氢-5H-二苯并[b,e][1,4] 二氮杂。机理研究支持以下多米诺骨牌序列。通过氧化钯插入,邻苯二胺的分子间单-N-苄基化,主要是在 2-溴苄基溴的苄基位置,然后是分子内 N'-芳基化。分子内 N'-芳基化被证明是通过远程辅助氮原子与钯原子的配位来促进的。