Potassium Carbonate → Methyl 1-{[(4-tert-butoxy-4-oxobutyl)amino]carbonyl}-6-(4-fluorophenyl)-2-methoxy-4-methyl-1,6-dihydro-5-pyrimidinecarboxylate

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Reaction Steps

To a solution of 5-methyl 1-(4-nitrophenyl) 6-(4-fluorophenyl)-2-methoxy-4-methyl-1,5(6H)-pyrimidinedicarboxylate (88.7 mg, 0.200 mmol) and K2CO3 (41.5 mg, 0.300 mmol) in CH3OH/CH2Cl2 (0.1/2.0 mL) was added tert-butyl 4-aminobutanoate (31.8 mg, 0.200 mmol). After stirring at rt for 1 h, the mixture was washed with saturated Na2CO3 and brine. The organic layer was dried over MgSO4 and concentrated in vacuo. The crude material was purified by flash chromatography (5%-10% 2 M NH3/MeOH in 50% EtOAc/Hexanes) to afford the product (92.2 g, 99%). mp 135-138° C.; 1H NMR (CD3OD) δ 7.29-7.23 (m, 2H), 6.97-6.88 (m, 2H), 6.65 (s, 1H), 3.98 (s, 3H), 3.66 (s, 3H), 3.38-3.30 (m, 2H), 2.43 (s, 3H), 2.28 (t, 2H, J=7.2 Hz), 1.89-1.78 (m, 2H), 1.43 (s, 9H); ESMS m/e: 464.1 (M+H)+.

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