Aniline → 3-(2,4-Diphenylamino-pyrimidin-5-yl)-2-(3,5-bis-trifluoromethyl-phenyl)-propionic acid methyl ester

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A mixture of 2-(3,5-bis-trifluoromethyl-phenyl)-3-(2,4-dichloro-pyrimidin-5-yl)-propionic acid methyl ester (0.35 g, 0.78 mmol) (from Example 8b supra) and aniline (2.0 mL) (Aldrich) was heated at 120° C. for 1 hour. The reaction mixture was washed with hexanes (50 mL×3) and the supernatant was decanted off after each time. The residue was dissolved in ethyl acetate (100 mL) and successively washed with saturated aqueous ammonium chloride solution (30 mL), water (30 mL) and brine (30 mL), dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo. The crude product was then triturated with ethyl acetate-hexanes. The resulting solid was collected by filtration and washed with diethyl ether to give crude 3-(2,4-diphenylamino-pyrimidin-5-yl)-2-(3,5-bis-trifluoromethyl-phenyl)-propionic acid methyl ester as an off-white solid which was used in the next step without further purification. (Yield 0.47 g).

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