کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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66683 | 48444 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An efficient synthesis of benzoxazoles using silica-supported tin exchanged silicotungstic acid catalyst An efficient synthesis of benzoxazoles using silica-supported tin exchanged silicotungstic acid catalyst](/preview/png/66683.png)
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.
An efficient heterogeneous silica-supported tin exchanged silicotungstic acid catalyst is demonstrated for the synthesis of benzaxazoles by reaction of amonophenols with orthoesters under mild reaction conditions.Figure optionsDownload high-quality image (31 K)Download as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 328, Issues 1–2, 3 August 2010, Pages 119–123