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

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-amino-4,5-dimethoxybenzoic acid (29.6 g, 0.15 mol) and formamide (0.6 mol, 24 mL) was stirred vigorously under nitrogen atmosphere. The mixture was heated to 145° C. for 4 hours. After completion the reaction mixture was cooled and water (120 mL) was added. The solid was filtered, washed with cold water (2×20 mL) followed by hexane (2×20 mL) to give 12.5 g of the desired product in 40% yield. Mp. 295-296° C. (lit 296-297° C).

Provenance & Evidence