Potassium Carbonate → 2-[4-(1-Methyl-6-oxo-1,6-dihydro-[4,4']bipyrimidinyl-2-yloxy)piperidin-1-yl]benzaldehyde

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To a mixture of 1-methyl-2-(piperidin-4-yloxy)-1H-[4,4′]bipyrimidinyl-6-one (1.00 g, 3.48 mmol) and 2-fluorobenzaldehyde (475 mg, 3.83 mmol) in dimethyl sulfoxide (3.50 ml) was added potassium carbonate (1.44 g, 10.4 mmol). The mixture was stirred at 120° C. for 4 hours. The mixture was partitioned between water and chloroform. The organic layer was washed with water (three times), dried over sodium sulfate, and concentrated in vacuo. The residue was purified by silica gel column chromatography (eluent; ethyl acetate) to afford 2-[4-(1-methyl-6-oxo-1,6-dihydro-[4,4′]bipyrimidinyl-2-yloxy)piperidin-1-yl]benzaldehyde as a yellow solid (711 mg, 1.82 mmol, 52%).

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