1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (S)-4-((1-(2-(3,5-dichlorophenylamino)acetyl)piperidin-3-yl)(methyl)amino)-5,6-dihydropyrido[2,3-d]pyrimidin-7(8H)-one

Participants

Reaction Steps

To a solution of (S)-4-(methyl(piperidin-3-yl)amino)-5,6-dihydropyrido[2,3-d]pyrimidin-7(8H)-one (150 mg, 0.6 mmol) in DMF (5 mL) was added EDCI (164 mg, 0.85 mmol), HOBt (114 mg, 0.85 mmol), 2-(3,5-dichlorophenylamino)acetic acid (126 mg, 0.57 mmol) and DIEA (147 mg, 1.14 mmol) at 0° C. The reaction mixture was stirred at rt overnight, diluted with EtOAc and washed with water. The aqueous layer was extracted with the EtOAc, the combined organic layer was dried over Na2SO4 and evaporated in vacuo to give the crude compound that was purified by column chromatography (silica gel, gradient MeOH in CH2Cl2) to afford (25 g, 9%) of the titled compound. 1H NMR (400 MHz, CD3OD): δ 8.29 (s, 1H), 6.61-6.60 (d, 1H), 6.59-6.58 (m, 2H), 4.28-4.01 (m, 1H), 3.99-3.95 (m, 2H), 3.68-3.66 (t, J=4.4 Hz, 1H), 3.57-3.54 (t, J=4.4 Hz, 1H), 3.34 (s, 3H), 3.08-2.97 (m, 3H), 2.60-2.53 (m, 2H), 2.03-2.00 (m, 2H), 1.43-1.26 (m, 3H). LC-MS: m/z [M+1]=463.

Provenance & Evidence