Chemoselective reduction of nitroaromatics using recyclable alumina-supported nickel nanoparticles in aqueous medium—exploration to one pot synthesis of benzimidazoles
作者:Avishek Ghatak、Sanjay Bhar
DOI:10.1080/00397911.2021.2024853
日期:2022.2.1
protocol for chemoselective and regioselective reduction of nitroaromatics in water has been achieved using easily accessible alumina-supported nickel nanoparticles as a stable recyclable heterogeneous catalyst. Various sensitive substituents like allyloxy, benzyloxy, t-butyldimethylsilyloxy, hydroxymethyl, alkoxycarbonyl, formyl, keto, carboxylic acid, chloro, bromo, azo and cyano were tolerated in
摘要 使用易于获得的氧化铝负载的镍纳米粒子作为稳定的可回收多相催化剂,实现了一种经济且生态兼容的合成方案,用于化学选择性和区域选择性还原水中的硝基芳烃。在上述方案中允许使用各种敏感的取代基,如烯丙氧基、苄氧基、叔丁基二甲基甲硅烷氧基、羟甲基、烷氧基羰基、甲酰基、酮基、羧酸、氯、溴、偶氮和氰基。该方法已扩展到通过 2-硝基苯胺与不同取代的苯甲醛的一锅还原缩合来构建咪唑衍生物。一些合成的咪唑已被用作抗菌剂、抗血小板剂和抗血栓剂。