N-[4-(2-amino-6-chloropyrimidin-4-ylsulfamoyl)phenyl]-acetamide → 4-amino-N-(2-amino-6-chloro-pyrimidin-4-yl)-benzenesulfonamide

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Reaction Steps

0.885 g (0.0026 mol) of N-[4-(2-amino-6-chloropyrimidin-4-ylsulfamoyl)phenyl]-acetamide was dissolved in 31 ml of 0.5N NaOH and boiled at reflux for 3 hours. The mixture was extracted with ethyl acetate, the aqueous phase was saturated with sodium chloride and the remaining ethyl acetate was distilled off on a rotary evaporator. Then, the aqueous phase was made acid with 3N HCl and the precipitate which separated was filtered off under suction. After drying there was obtained 0.76 g (86%) of 4-amino-N-(2-amino-6-chloro-pyrimidine-4-yl)-benzenesulfonamide as beige crystals; m.p.: >265° C. (dec.).

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