Highly efficient, one-pot, solvent-free synthesis of tetrasubstituted imidazoles using HClO4-SiO2 as novel heterogeneous catalyst

被引：206

作者：

Kantevari, Srinivas ^{[1
]}

Vuppalapati, Srinivasu V. N. ^{[1
]}

Biradar, Dhanraj O. ^{[1
]}

Nagarapu, Lingaiah ^{[1
]}

机构：

[1] Indian Inst Chem Technol, Organ Chem Div 2, Hyderabad 500007, Andhra Pradesh, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2007年 / 266卷 / 1-2期

关键词：

imidazoles; four-component reaction; one-pot synthesis; MCRs; silica-supported perchloric acid;

D O I：

10.1016/j.molcata.2006.10.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly efficient, one-pot, four-component synthesis of 1,2,4,5-tetrasubstituted imidazoles was reported the condensation of various aldehydes, benzil, aliphatic or aromatic primary amines and ammonium acetate under solvent free conditions using perchloric acid adsorbed on silica gel (HClO4-SiO2) as catalyst in excellent yields. HClO4-SiO2 exhibited remarkable catalytic activity with respect to the reaction time (2-20 min), amount of catalyst. Present protocol with HC104-SiO2 catalyst is convincingly superior to the recently reported catalytic methods. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：109 / 113

页数：5

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