Ethyl 4-piperidinecarboxylate → 1-(2-{(3,5-Bis-trifluoromethyl-benzyl)-[2-(ethoxycarbonyl-ethyl-amino)-5-trifluoromethyl-benzyl]-amino}-pyrimidin-5-yl)-ethyl piperidine-4-carboxylate

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Reaction Steps

Ethyl (2-{[(3,5-bis-trifluoromethyl-benzyl)-(5-bromo-pyrimidin-2-yl)-amino]-methyl}-4-trifluoromethyl-phenyl)-carbamate (412 mg) is dissolved in toluene (5 ml), and thereto are added tris(dibenzylideneacetone)dipalladium (112 mg), 2-(di-tert-butylphosphino)biphenyl (146 mg), sodium tert-butoxide (176 mg) and ethyl piperidine-4-carboxylate (140 μl), and the mixture is stirred under nitrogen atmosphere at room temperature overnight. To the reaction solution are added a saturated aqueous sodium bicarbonate solution and ethyl acetate, and the mixture is separated, and the organic layer is washed with a saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (hexane:ethyl acetate=19:1→4:1) to give 1-(2-{(3,5-bis-trifluoromethyl-benzyl)-[2-(ethoxycarbonyl-ethyl-amino)-5-trifluoromethyl-benzyl]-amino}-pyrimidin-5-yl)-ethyl piperidine-4-carboxylate (72 mg). MS (m/z): 750 [M+H]+

Provenance & Evidence