Stannous chloride dihydrate → 4-Hydrazino-3-methoxybenzoic acid hydrochloride

참여 물질

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반응 단계

A solution of 2.17 g of NaNO2 in 40 ml of H2O is added slowly to a solution, cooled to 0° C., of 5 g of 4-amino-3-methoxybenzoic acid in 50 ml of concentrated HCl. After 1 hour 15 minutes of stirring at 0° C., the mixture is cooled to −10° C., and a solution of 23.6 g of SnCl2.2H2O in 20 ml of concentrated HCl and 20 ml of water is added over 30 min. After one and a half hours of stirring at −10° C., the mixture is filtered, and the precipitate is washed with 50 ml of pentane to obtain, after drying, 6 g of expected product.

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