Dimethyl Sulfoxide → 3-{[[2-(Cyclopropylmethyl-propyl-amino)-5-trifluoromethyl-benzyl]-(5-hydroxy-pyrimidin-2-yl)-amino]-methyl}-5-trifluoromethyl-benzonitrile

Participants

Reaction Conditions

Reaction Steps

3-({(5-Bromo-pyrimidin-2-yl)-[2-(cyclopropylmethyl-propyl-amino)-5-trifluoromethyl-benzyl]-amino}-methyl)-5-trifluoromethyl-benzonitrile (2.81 g) is dissolved in dimethylsulfoxide (12.6 ml) and the mixture is degassed under reduced pressure and flushed with nitrogen gas. Thereto are added potassium acetate (1.32 g), bis(pinacolato)diboron (2.88 g) and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium methylene chloride complex (732 mg) and the mixture is heated at 80° C. under nitrogen atmosphere and stirred for 1 hour and 40 minutes. The reaction solution is cooled to room temperature and thereto are added water and ethyl acetate, and the mixture is separated, and the organic layer is washed with a saturated brine, dried over sodium sulfate and concentrated under reduced pressure. The resulting residue is dissolved in tetrahydrofuran (26 ml) and thereto is added dropwise a 30% aqueous hydrogen peroxide solution (15.7 ml) under ice-cooling. Two hours thereafter, thereto is added a saturated aqueous sodium thiosulfate under ice-cooling to consume the excess hydrogen peroxide, and thereto are added water and ethyl acetate, and the mixture is separated. The organic layer is washed with a saturated brine, dried over sodium sulfate and concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (hexane:ethyl acetate=4:1) to give 3-{[[2-(cyclopropylmethyl-propyl-amino)-5-trifluoromethyl-benzyl]-(5-hydroxy-pyrimidin-2-yl)-amino]-methyl}-5-trifluoromethyl-benzonitrile (1.94 g). MS (m/z): 564 [M+H]+.

Provenance & Evidence