Oxalic Acid → 2,3-Dihydroxy-naphth[2,3-F]quinoxaline-7,12-dione

Reaktionsgleichung

[NH2:1][C:2]1[C:15]2[C:14](=[O:16])[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[C:7](=[O:17])[C:6]=2[CH:5]=[CH:4][C:3]=1[NH2:18].[C:19](O)(=[O:23])[C:20](O)=[O:21].S(=O)(=O)(O)O>CN(C)C=O>[NH:1]1[C:2]2[C:15]3[C:14](=[O:16])[C:13]4[C:8]([C:7](=[O:17])[C:6]=3[CH:5]=[CH:4][C:3]=2[NH:18][C:20](=[O:21])[C:19]1=[O:23])=[CH:9][CH:10]=[CH:11][CH:12]=4

Komponenten

Versuchsvorschrift

1,2-Diaminoanthraquinone (1.19 g, 5 mmol) is dissolved in N,N-dimethylformamide (30 mL), and oxalic acid (0.46 g, 5 mmol) and concentrated sulfuric acid (0.1 mL) is added thereinto. After reverse flow for 16 hours, the reacted mixture is transferred into icy water (200 mL) for precipitation. The precipitate is collected and washed by hot alcohol and, so as to obtain the black compound 26, and the production rate is 30%.