Triethyl orthoacetate → 6-(4-Fluorophenyl)-2-methylpyrido[3,2-d]pyrimidin-4(1H)-one

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Reaction Steps

A suspension of 3-amino-6-(4-fluorophenyl)-pyridine-2-carboxylic acid amide (0.46 g, 2.0 mmol) in triethyl orthoacetate (10 ml) was heated under reflux for 3 hours. After cooling to room temperature, the precipitate was collected by filtration and washed with diethyl ether, yielded the title compound as a white solid (360 mg, yield 70%) which was characterised as follows: MS (m/z): 256 ([M+H]+, 100).

Provenance & Evidence