Trifluoroacetic acid → HCID 9805331, compound

Participants

Reaction Steps

To a mixture of N-{3-[1-(3-benzyl-4-oxo-3,4-dihydro-pyrido[2,3-d]pyrimidin-2-yl)-2-methyl-proplyamino]-propyl}-carbamic acid tert butyl ester (110 mg, 0.236 mmol), DIEA (82 μL, 0.473 mmol) and dichloromethane (2 mL) was added p-toluoyl chloride (47 μL, 0.354 mmol) dropwise. The reaction mixture was stirred at room temperature overnight, and then diluted with dichloromethane and washed with saturated sodium bicarbonate, water and brine. After concentration, the residue was subjected to flash silica gel chromatography using hexane-EtOAc (1:2) and EtOAc-MeOH (20:1) as eluent to give the corresponding crude acylated product, {3-[[1-(3-benzyl-4-oxo-3,4-dihydro-pyrido[2,3-d]pyrimidin-2-yl)-2-methyl-propyl]-(4-methyl-benzoyl)-amino]-propyl}-carbamic acid tert-butyl ester, which was then treated with 30% TFA in dichloromethane (3 mL) for 15 minutes, diluted with dichloromethane, washed with saturated sodium bicarbonate, water, and brine, and dried (Na2SO4). Concentration of the dichloromethane solution gave the title product, N-(3-amino-propyl)-N-[1-(3-benzyl-4-oxo-3,4-dihydro-pyrido[2,3-d]pyrimidin-2-yl)-2-methyl-propyl]-4-methyl-benzamide, as a white solid (89 mg, 78%).

Provenance & Evidence