Abstract
To investigate the green trinitration method of aromatic compounds, with Lewis acid/ionic liquid as catalyst and HNO3/Ac2O as nitration reagent, a Lewis acid/ionic liquid/HNO3/Ac2O system was established. In various combinations of Lewis acids and ionic liquids, Bi(NO3)3·5H2O/[HMIM]ClO4 proved to be a very efficient catalyst for the trinitration of activated aromatic compounds and reusable for 3 times. Reaction conditions for the trinitration were optimized and yields of the trinitro products were from mild to excellent. This sulfuric acid-free system has the advantages of strong trinitration ability, low environment pollution, low toxicity, low cost and high potential for industrial application.
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Supported by the National Natural Science Foundation of China(No.21376255).
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Sun, W., Yu, S. & Xian, M. A green and efficient trinitration system for aromatic compounds with Bi(NO3)3·5H2O/[HMIM]ClO4 as catalyst in HNO3/Ac2O. Chem. Res. Chin. Univ. 31, 761–765 (2015). https://doi.org/10.1007/s40242-015-5087-1
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DOI: https://doi.org/10.1007/s40242-015-5087-1