Methyl formate → HCID 11385587, compound

Participants

Reaction Steps

3-(4-Methoxy-phenyl)-7-phenylamino-1-piperidin-3-yl-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one (95 mg, 0.22 mmol) (from Example 4b supra) was dissolved at room temperature in methylformate (5 mL) (Aldrich). After stirring overnight the reaction mixture was concentrated to the crude product, which was purified by silica gel column chromatography with a 0–100% ethyl acetate in hexanes and then a 0–20% tetrahydrofuran in ethyl acetate gradient. After a precipitation out of dichloromethane with excess of pentane, 3-[3-(4-methoxy-phenyl)-2-oxo-7-phenylamino-3,4-dihydro-2H-pyrimido[4,5-d]pyrimidin-1-yl]-piperidine-1-carbaldehyde was isolated as an off-white solid. (Yield 90 mg, 89%).

Provenance & Evidence