Chemoselective reduction of aromatic nitro and azo compounds in ionic liquids using zinc and ammonium salts
作者:Faiz Ahmed Khan、Jyotirmayee Dash、Ch Sudheer、Rakesh Kumar Gupta
DOI:10.1016/j.tetlet.2003.08.080
日期:2003.10
were chemoselectively reduced to the corresponding amines using zinc and aqueous ammonium salts in ionic liquids as a safe and recyclable reaction medium. Our results specify the effect of ammonium salts in the process; the combination of Zn/NH4Cl in [bmim][PF6] or Zn/HCO2NH4 in [bmim][BF4] were the suitable conditions for the reduction of nitroarenes. Azobenzenes were also smoothly reduced to hydrazobenzenes
使用锌和铵盐在离子液体中作为安全和可回收的反应介质,将硝基芳烃化学选择性还原为相应的胺。我们的结果说明了铵盐在该过程中的作用。[bmim] [PF 6 ]中的Zn / NH 4 Cl或[bmim] [BF 4 ]中的Zn / HCO 2 NH 4的组合是还原硝基芳烃的合适条件。偶氮苯还可以在可回收的[bmim] [BF 4 ]中用Zn / HCO 2 NH 4(水溶液)平稳地还原为to苯,而不会过度还原为相应的苯胺。