Sulfuric Acid → 4-Bromopyridazine-3,6-diol

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of NH2NH2.H2SO4 (362 mg, 2.8 mmol) in H2O (5 mL) was added dropwise 3-bromofuran-2,5-dione (500 mg, 2.8 mmol), and the mixture was stirred at 90° C. for 4 hours. After the reaction, the mixture was filtered to get 4-bromo-1,2-dihydropyridazine-3,6-dione (300 mg, yield: 56%). 1H-NMR (DMSO-d6, 400 MHz) δ 12.47 (s, 1H), 11.17 (s, 1H), 7.62 (s, 1H). MS (M+H)+:191/193.

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