A Simple and Environmentally Benign Nitration of Pyrazoles by Impregnated Bismuth Nitrate
Journal of Heterocyclic Chemistry(2013)
摘要
We report herein a facile, rapid, and environmentally friendly synthesis of nitropyrazoles in good yields using silica-bismuth nitrate and silica-sulfuric acid-bismuth nitrate at room temperature for the first time. The relatively non-toxic nature, ease of handling, easy availability, and low cost make the present procedure attractive for the nitration of a wide variety of diazoles in the drug and pharmaceutical industries.
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关键词
pyrazoles,environmentally benign nitration,nitrate
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