4,6-dichloro-N-ethylpyrimidin-2-amine → N-[4-(6-chloro-2-ethylamino-pyrimidin-4-ylsulfamoyl)-phenyl]-acetamide

Beteiligte Stoffe

Reaktionsschritte

2.0 g (0.011 mol) of (4,6-dichloropyrimidin-2-yl)-ethylamine and 5.67 g (0.022 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 residual ethyl acetate dissolved in the aqueous phase was distilled off on a rotary evaporator. The aqueous phase was made acid with 1N HCl, the crystals which separated were filtered off under suction and washed with water. After drying there were obtained 2.88 g (75%) of N-[4-(6-chloro-2-ethylamino-pyrimidin-4-ylsulfamoyl)-phenyl]-acetamide as beige crystals, which were used directly in the next step.

Herkunft & Nachweise