1,2,4-Benzenetriamine, hydrochloride (1:2) → 2,3-Bis(4-hydroxyphenyl)quinoxalin-6-ylamine Dihydrochloride

関与物質

反応手順

98.04 mg (0.5 mmol) of 1,2,4-benzenetriamine dihydrochloride and 121.2 mg (0.5 mmol) of 4,4′-dihydroxybenzil were dissolved in 2 ml of 1:1 mixture of dioxane-water. The reaction was refluxed for 3 hours. Then solvent was removed in vacuo. The residue was dissolved in 2 ml of methanol and this solution was added dropwise to 40 ml of diethyl ether. The formed dark-red precipitate was collected, washed with ether and dried in vacuo to give 168.3 mg (83.7% yield) of the product. 98.7% purity by LC/MS (230 DAD). Mass-spec [ES+]=330.8. 1H NMR (500 MHz, MeOH-d4) 6.76–6.77 (2H, d), 6.87–6.89 (2H, d), 7.05–7.06 (1H, d), 7.29–7.31 (2H, d), 7.38–7.40 (2H, d), 7.50–7.52 (1H, m), 7.99–8.01 (1H, d).

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