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

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Reaction Steps

(3,5-Bis-trifluoromethyl-benzyl)-(5-bromo-pyrimidin-2-yl)-(2-fluoro-5-trifluoromethyl-benzyl)-amine (300 mg) is dissolved in toluene (5 ml) and thereto are added tris(dibenzylideneacetone)dipalladium (48 mg), 2-(di-tert-butylphosphino)biphenyl (62 mg), sodium tert-butoxide (75 mg) and ethyl piperidine-4-carboxylate (120 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→9:1) to give 1-{2-[(3,5-bis-trifluoromethyl-benzyl)-(2-fluoro-5-trifluoromethyl-benzyl)-amino]-pyrimidin-5-yl}-ethyl piperidine-4-carboxylate (111 mg). MS (m/z): 653 [M+H]+

Provenance & Evidence