3-Bromo-2,5-furandione → HCID 90419128, 화합물

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(4-methoxybenzyl)hydrazine hydrochloride (2.132 g, 11.30 mmol) and 3-bromofuran-2,5-dione (2 g, 11.30 mmol) in water (20 ml) was stirred and heated at 100° C. overnight. The mixture was cooled to room temperature and filtered to collect the solid. The solid was triturated with a mixture of ethyl acetate and ethyl ether (1/4) and the mixture was filtered. The insoluble residue was 4-bromo-1-(4-methoxybenzyl)-1,2-dihydropyridazine-3,6-dione. LRMS m/z (M+H) 311.0 found, 311.0 required. The filtrate was concentrated in vacuo and the residue was purified by column chromatography on silica gel (Petroleum ether: ethyl acetate=1/1)) to give 5-bromo-1-(4-methoxybenzyl)-1,2-dihydropyridazine-3,6-dione. LRMS m/z (M+H) 311.0 found, 311.0 required.

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