Characterization of the Products Derived from the Nitration of 1,5aDihydroxyanthraquinone (anthrarufin)and 1,8-Dihydroxyanthraquinone (Chysazin)

Tipo de material: Texto

TextoSeries ; Dyes and Pigments, 12, p.145-155, 1990Trabajos contenidos:

Ukponmwan, D.0
Freeman, H.S

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Resumen: When 2,5_djhydroxyunthraquinone (AnthraruJn)and I,8-dihydroxyanthra-quinone (Chrysazin)were nitrated using a mixture of concentrated sulfuric and nitric acids in the presence of boric acidat IO-2S"C, three major products formed in each reu~tion. The products were separated by ions-pressure column chromatography and identified by ' H-NMR andmass spectrometr~c analyses in tandem. The products identified result from the mono-, di- and tetranitration of these dihydroxya~thraqainones.

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When 2,5_djhydroxyunthraquinone (AnthraruJn)and I,8-dihydroxyanthra-quinone (Chrysazin)were nitrated using a mixture of concentrated sulfuric and nitric acids in the presence of boric acidat IO-2S"C, three major products formed in each reu~tion. The products were separated by ions-pressure column chromatography and identified by ' H-NMR andmass spectrometr~c analyses in tandem. The products identified result from the mono-, di- and tetranitration of these dihydroxya~thraqainones.

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