Chemoselective reduction of aromatic nitro and azo compounds in ionic liquids using zinc and ammonium salts |
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| Authors: | Faiz Ahmed Khan Jyotirmayee DashCh Sudheer Rakesh Kumar Gupta |
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| Institution: | Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India |
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| Abstract: | Nitroarenes 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 with Zn/HCO2NH4 (aq.) in recyclable bmim]BF4] without any over reduction to the corresponding anilines. |
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| Keywords: | ionic liquids zinc reduction nitroarenes anilines azo compounds hydrazobenzenes |
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