4,6-Dichloro-n-methylpyrimidin-2-amine → N-(6-chloro-2-methylamino-pyrimidin-4-yl)-3-trifluoromethyl-benzenesulfonamide

Participants

Reaction Steps

0.27 g (0.00155 mol) of (4,6-dichloro-pyrimidin-2-yl)-methylamine and 0.82 g (0.0031 mol) of 3-trifluoromethyl-benzenesulfonamide potassium salt were stirred in 10 ml of 1-methyl-2-pyrrolidone at 150° C. for 8 hours. Then, the solvent was distilled off in a high vacuum, the residue was partitioned in ethyl acetate/water and extracted. The aqueous phase was made acid with 4N HCl and extracted with dichloromethane. The residue was chromatographed over silica gel with cyclohexane/ ethyl acetate 2:1 as the eluent. There was obtained 0.26 g (69%) of N-(6-chloro-2-methylamino-pyrimidin-4-yl)-3-trifluoromethyl-benzenesulfonamide as white/beige crystals; m.p.: 190-193° C.

Provenance & Evidence