Triethylamine → (E)-2-(2,6-difluorobenzamido)-5-[4-(methyl-pyrimidin-2-ylamino)phenyl]pent-4-enoic acid methyl ester

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Reaction Steps

Under an argon atmosphere, triethylamine (0.028 ml) and 2,6-difluorobenzoyl chloride (0.015 ml) were added to a solution of 2-amino-5-[4-(methyl-pyrimidin-2-ylamino)phenyl]pent-4-enoic acid methyl ester (31.7 mg) in dichloromethane (2 ml), and the resulting mixture was stirred at room temperature for 2 hours. Saturated aqueous sodium hydrogen carbonate solution was added to the reaction solution and the resulting mixture was extracted with ethyl acetate. Organic layer was washed twice with water and once with saturated brine, and dried over anhydrous sodium sulfate. After removing anhydrous sodium sulfate by filtration, the filtrate was concentrated. The residue was purified by thin layer chromatography (silica gel, developing solvent: cyclohexane/ethyl acetate=3/2) to obtain (E)-2-(2,6-difluorobenzamido)-5-[4-(methyl-pyrimidin-2-ylamino)phenyl]pent-4-enoic acid methyl ester (42 mg).

Provenance & Evidence