A solution of 520 mg (1.6 mmol) of 4-chloro-5-(2,6-dichloroanilinomethyl)-2-methylthiopyrimidine, 420 mg (1.6 mmol) of (2-(3-aminophenyl)-1,1-dimethyl-ethyl)-carbamic acid tert-butyl ester and 250 mg (1.7 mmol) of N,N-diethylaniline in 5 ml of dichloromethane was heated at 80° C. until the solvent had evaporated and then to 120° C. for 30 minutes and then cooled. The product was purified by flash chromatography on silica gel eluting with diethyl ether/isohexane in a ratio 1:1 to give 350 mg (39%) of (2-(3-[5-[(2,6-dichlorophenylamino)-methyl]-2-methylthiopyrimidin-4-yl-amino]-phenyl)-1,1-dimethyl-ethyl)-carbamic acid tert-butyl ester as a white solid. [Mass spectrum (ESI) MH+ =562].
