Formamide → 3H,4H-pyrido(3,4-d)pyrimidin-4-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-amino isonicotinic acid (485 mg, 3.51 mmol) in formamide (3 mL) is heated to 16° C. for 12 h. Upon cooling, the resulting solid is filtered and washed with H2O and dried in a vacuum oven to yield 3H-pyrido[3,4-d]pyrimid-4-one (373 mg, 72%). 1H NMR (DMSO) δ 12.60 (1H, brs), 9.06 (1H, s), 8.68 (1H, d, J=5.3 Hz), 8.23 (1H, s), 7.96 (1H, d, J=5.1 Hz).

Provenance & Evidence