作者:Ramesh C. Samanta、Hisashi Yamamoto
DOI:10.1002/chem.201502234
日期:2015.8.17
Electrophilic halogenation is used to produce a wide variety of halogenated compounds. Previously reported methods have been developed mainly using a reagent‐based approach. Unfortunately, a suitable “catalytic” process for halogen transfer reactions has yet to be achieved. In this study, arylamines have been found to generate an N‐halo arylamine intermediate, which acts as a highly reactive but selective catalytic
亲电子卤化用于生产各种卤代化合物。先前报道的方法主要是使用基于试剂的方法开发的。不幸的是,尚未实现用于卤素转移反应的合适的“催化”方法。在这项研究中,已发现芳基胺可生成N卤代芳基胺中间体,该中间体可作为高反应性但选择性的催化亲电卤素源。使用市售的N将各种杂芳族和芳族化合物卤化-卤代琥珀酰亚胺,例如NCS,NBS和NIS,具有良好或优异的收率,并且具有很高的选择性。在未活化的双键的情况下,在氯化条件下获得烯丙基氯化物,而聚烯烃发生溴环化。可以通过改变催化剂的芳烃部分的电子性质来调节催化剂的反应性。