Transetherification of 2,4-dimethoxynitrobenzene by aromatic nucleophilic substitution
作者:Jiho Song、Hae Ju Kang、Jung Wuk Lee、Michelle A. Wenas、Seung Hwarn Jeong、Taeho Lee、Kyungsoo Oh、Kyung Hoon Min
DOI:10.1371/journal.pone.0183575
日期:——
In view of the few reports concerning aromatic nucleophilic substitution reactions featuring an alkoxy group as a leaving group, the aromatic nucleophilic substitution of 2,4-dimethoxynitrobenzene was investigated with a bulky t-butoxide nucleophile under microwave irradiation. The transetherification of 2,4-dimethoxynitrobenezene with sodium t-butoxide under specific conditions, namely for 20 min
鉴于关于以烷氧基为离去基团的芳族亲核取代反应的报道很少,因此在微波辐射下用大体积的叔丁氧基亲核体研究了2,4-二甲氧基硝基苯的芳族亲核取代。2,4-二甲氧基硝基苯与叔丁醇钠在特定条件下(即在110°C下于10%的二甲氧基乙烷的甲苯溶液中)进行20分钟的醚化反应,制得所需的产物,产率为87%,具有排他的邻位选择性。筛选各种反应条件以获得最大产率。2,4-二甲氧基硝基苯被叔丁醇芳族亲核取代应在受控条件下进行,以避免形成副产物,这与二卤代活化苯不同。在形成的副产物中,