To a solution of 1.30 g (5.3 mmol) methyl-(2-methylsulfanyl-4-o-tolyl-pyrimidin-5-yl)-amine and 1.36 ml (7.95 mmol) N-ethyldiisopropylamine in 15 ml CH2Cl2 a solution of 1.30 g (5.3 mmol) 2-(3,5-bis-trifluoromethyl-phenyl)-2-methyl-propionyl chloride in 5 ml CH2Cl2 were added and the reaction mixture stirred for 24 hrs. at RT. The reaction mixture was poured onto 50 ml 0.5 N NaOH-solution. The phases were separated, the aqueous layer washed twice with 50 ml CH2Cl2. The combined organic layers were dried (Na2SO4), filtered and evaporated. The residue was purified by chromatography (SiO2, CH2Cl2/ethyl acetate 10:1) to give 2.30 g (82%) 2-(3,5-bis-trifluoromethyl-phenyl)-N-methyl-N-(2-methylsulfanyl-4-o-tolyl-pyrimidin-5-yl)-isobutyramide as a white solid, m.p. 124-125°, MS (ISP): 528.2 (M+H+).
