Chemoselective reduction of aromatic nitro and azo compounds in ionic liquids using zinc and ammonium salts

被引：125

作者：

Khan, FA ^{[1
]}

Dash, J ^{[1
]}

Sudheer, C ^{[1
]}

Gupta, RK ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India

来源：

TETRAHEDRON LETTERS | 2003年 / 44卷 / 42期

关键词：

ionic liquids; zinc; reduction; nitroarenes; anilines; azo compounds; hydrazobenzenes;

D O I：

10.1016/j.tetlet.2003.08.080

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

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. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：7783 / 7787

页数：5

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