- An improved method for the preparation of 4,5-diaminochrysazin
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4,5-Diaminochrysazin was prepared from chrysazin by ethylation and nitration followed by reaction with hydroiodic acid (HI). Treatment of 1,8-diethoxy-4,5-dinitroanthraquinone with HI resulted not only in O-deethylation, but also in reduction of nitro groups with more than 95% yield. This is a unique finding and is reported for the first time with a definite improvement over literature methods and is suitable for scale-up. Copyright Taylor & Francis Group, LLC.
- Kumar, P. Hareesh,Rao, G. Venkateshwara,Narayanaswamy,Reddy, G. Chandrasekara
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experimental part
p. 3501 - 3505
(2011/02/22)
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