2-Amino-4,6-dichloropyrimidine → N-[4-(2-amino-6-chloropyrimidin-4-ylsulfamoyl)phenyl]-acetamide

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Reaction Steps

0.98 g (0.006 mol) of 2-amino-4,6-dichloropyrimidine and 3.03 g (0.012 mol) of N-(4-sulfamoyl-phenyl)-acetamide potassium salt were stirred in 10 ml of 1-methyl-2-pyrrolidone at 140° C. for 8 hours. Then, the solvent was distilled off in a high vacuum, the residue was partitioned in ethyl acetate/water, the inorganic phase was saturated with sodium chloride and the remaining ethyl acetate dissolved in the aqueous was distilled off on a rotary evaporator. The aqueous phase was made acid with 1N HCl, the crystals which separated were filtered off under section and washed with water. After drying there were obtained 1.37 g (67%) of N-[4-(2-amino-6-chloro-pyrimidin-4-yisulfamoyl)-phenyl]-acetamide as beige crystals; m.p.: 272-273° C. (dec.).

Provenance & Evidence