Wu Yi-qun
2009
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Journal
Chinese Journal of Synthetic Chemistry
Abstract
A novel diazo compound,2,6-bis(4-hydroxyphenylazo)-9,10-anthraquinone,was synthesized by coupling reaction of phenol with 2,6-diaminoanthraquinone bisdiazonium salt(2),which was obtained by diazo reaction of 2,6-diaminoanthraquinone with hydrochloric acid and sodium nitrate.The structure was confirmed by 1H NMR,IR,MS and elemental analysis.The optimal coupling reaction conditions in yield of 60% at 0 ℃~5 ℃ for 4 h were as follows: 2 was 2.0 mmol;n(2) ∶n(phenol) was 1.0 ∶2.5;pH was 9.