Methanol → Methyl(4S)-3-[({3-[4-(3-aminophenyl)-1-piperidinyl]propyl}amino)carbonyl]-4-(3,4-difluorophenyl)-6-(methoxymethyl)-2-oxo-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate

Participants

Reaction Steps

A mixture of 3.02 g (6.33 mmol) 5-methyl 1-(4-nitrophenyl) (6S)-6-(3,4-difluorophenyl)-4-(methoxymethyl)-2-oxo-3,6-dihydro-1,5 (2H)-pyrimidinedicarboxylate, 1.50 g (5.80 mmol) of 3-(4-(3-nitrophenyl)-3,6-dihydro-1(2H)-pyridinyl)-1-propanamine, 7.94 g (75.5 mmol) of K2CO3 and 1.00 mL of methanol in 200 mL dichloromethane (under argon) was stirred at room temperature for 1 hour. The reaction mixture was filtered and concentrated in vacuo. The residue was dissolved in 100 mL of ethyl acetate and washed 3×50 mL of 5% aqueous NaOH solution, the organic layer was dried (MgSO4) and concentrated in vacuo. The residue was dissolved in 100 mL of anhydrous ethanol containing 0.50 g 10% Pd/c and the reaction mixture was stirred under a hydrogen balloon for 24 hours. The reaction mixture was passed through a column of Celite 545 filtering agent, washed with ethanol, the filtrate was dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography (silica, 9.5:0.5, dichloromethane:methanol+1% isopropyl amine) to afford 1.65 g (52.0% yield) of the desired product: 1H NMR (400 MHz, CDCl3) δ 7.80 (s, 1H), 7.22–7.02 (m, 2H), 6.95 (t, J=8.70 Hz, 1H), 6.63–6.44 (m, 4H), 4.56 (Abq, 2H), 3.62 (s, 3H) 3.33 (s, 3H), 3.32-3.20 (m, 4H), 2.96 (br s, 2H), 2.33 (t, J=7.50 Hz, 2H), 2.11–1.94 (m, 3H), 1.81–1.64 (m, 4H); ESMS m/e: 572.3 (M+H)+;

Provenance & Evidence