Citric Acid → Ethyl 4-(2-{(3,5-bis-trifluoromethyl-benzyl)-[2-(6-dimethylamino-pyrimidin-4-yloxy)-5-trifluoromethyl-benzyl]-amino}-pyrimidin-5-yloxy)-butyrate

Participants

Reaction Conditions

Reaction Steps

Ethyl 4-(2-{(3,5-bis-trifluoromethyl-benzyl)-[2-(6-chloro-pyrimidin-4-yloxy)-5-trifluoromethyl-benzyl]-amino}-pyrimidin-5-yloxy)-butyrate (170 mg) is dissolved in toluene (5 ml), and thereto are added diisopropylethylamine (136 μl), 2.0M-dimethylamine/tetrahydrofuran solution (0.4 ml) and the mixture is stirred at 50° C. for 1 day. The reaction solution is cooled to room temperature, and thereto are added aqueous citric acid solution and ethyl acetate, and the mixture is separated. The organic layer is washed with a saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=4:1→2:1) to give ethyl 4-(2-{(3,5-bis-trifluoromethyl-benzyl)-[2-(6-dimethylamino-pyrimidin-4-yloxy)-5-trifluoromethyl-benzyl]-amino}-pyrimidin-5-yloxy)-butyrate (115 mg). MS (m/z): 747 [M+H]+

Provenance & Evidence