Some 4-substituted benzaldehydes, 4-substituted benzoic acids and substituted nitrobenzenes were subjected to nitration using potassium nitrate in polyphosphoric acid. The method was found useful to obtain single nitro-product in each case.
NASIM HASAN RAMA ,RASHID IQBAL ,FARAG ALI MADHWA ,MUHAMMAD ZIA Ul HAQ ,
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