Formamide → 6,7-Dimethoxy-3H-quinazolin-4-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 4,5-dimethoxyanthranilic acid (19.7 g, 100 mmol) and formamide (10 ml) was heated at 190° C. for 5 hours. The mixture was allowed to cool to approximately 80° C. and water (50 ml) was added. The mixture was then allowed to stand at ambient temperature for 3 hours. Collection of the solid by suction filtration, followed by washing with water (2×50 ml) and drying in vacuo, yielded 6,7-dimethoxy-3,4-dihydroquinazolin-4-one (3.65 g, 18% yield) as a white solid:

Provenance & Evidence