Hydrogen Bromide → 4-(2-Fluoro-4-nitrophenoxy)-7-hydroxy-6-methoxyquinoline

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Reaction Steps

7-Benzyloxy-4-(2-fluoro-4-nitro-phenoxy)-6-methoxy-quinoline (2.75 g, 6.54 mmol) was added slowly in portion into hydrobromic acid solution (33% in acetic acid, 45 ml). The mixture was stirred at room temperature for 2 hours, then poured into diethyl ether (300 ml). The precipitate was filtered and washed with diethyl ether. The solid hydrobromide salt was stirred in the mixture of sodium acetate aqueous solution (10%, 60 ml) and ethyl acetate (15 ml) for 1 day. The precipitate was filtered, washed with water and dried to give 1.82 g of product [G]. Yield: 86%

Provenance & Evidence