An efficient synthesis of benzoxazoles using silica-supported tin exchanged silicotungstic acid catalyst

被引：10
作者：
Srivani, A. [1 ]
Rao, K. T. Venkateswar [1 ]
Prasad, P. S. Sai [1 ]
Lingaiah, N. [1 ]
机构：
[1] Indian Inst Chem Technol, Catalysis Lab, I&PC Div, Hyderabad 500607, Andhra Pradesh, India
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2010年 / 328卷 / 1-2期
关键词：
Aminophenol; Orthoesters; Benzoxazole; Tin; Silicotungstic acid; Silica; HETEROPOLYACIDS; BENZIMIDAZOLES;
D O I：
10.1016/j.molcata.2010.06.009
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：
An efficient method for the preparation of benzoxazoles by reacting aminophenols with orthoesters in the presence of silica-supported tin exchanged silicotungstic acid catalyst under mild conditions with high yield and selectivity is demonstrated. The catalysts were characterized by FT-IR and pyridine adsorbed FT-IR. The catalyst exhibited consistent activity upon recycling and is highly active compared to other catalysts. The role of Lewis acidity of the catalysts and plausible reaction mechanism is presented. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：119 / 123
页数：5
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