Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 328, Issue 1-2, Pages 119-123Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2010.06.009
Keywords
Aminophenol; Orthoesters; Benzoxazole; Tin; Silicotungstic acid; Silica
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Funding
- Council of Scientific and Industrial Research (CSIR), India
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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.
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