作者:Jun-Hui Xu、Yan-Qiong Ma、Jian-Ping Wei、Fang-Mei Li、Xin-Hua Peng
DOI:10.1515/chempap-2015-0077
日期:2015.1.1
electrophilic bromination, acetylation, radical benzylic bromination, N-alkylation and hydrolysis processes. The addition of aqueous hydrogen peroxide could enhance the utilisation of liquid bromine in the electrophilic bromination of o-toluidine, avoiding the hazardous HBr generated as a by-product. In addition, liquid bromine promoted by MnO2 was used efficiently for the radical benzylic bromination of N-acetyl-N-(2
通过邻苯甲酰苯胺为原料,通过亲电溴化,乙酰化,自由基苄基溴化,N-烷基化和水解过程的连续步骤,有效地制得了用作治疗呼吸道疾病的祛痰药的氨溴索,总收率为62%。加入过氧化氢水溶液可以提高邻甲苯胺的亲电溴化反应中液体溴的利用率,避免了副产物HBr的产生。另外,由MnO 2促进的液体溴可在温和条件下有效地用于N-乙酰基-N-(2,4-二溴-6-甲基苯基)乙酰胺的自由基苄基溴化反应。