Water → HCID 136347601, compound

Participants

Reaction Steps

A solution of 4-(methylthio)-6-methoxy-7-benzyloxyquinazoline (29.5 g, 0.095 mol) in trifluoroacetic acid (250 ml) was heated at reflux for 3 hours. The mixture was cooled, water was added, and the pH adjusted to pH 5 with sodium hydroxide (2.0 N). The solid was filtered, washed with water and diethyl ether and dried in vacuo. The solid was redissolved in methanol (2000 ml) and water (500 ml), the pH was adjusted to 7 with sodium hydroxyde (2.0 N) and the precipitated solid was collected by suction filtration. Drying in vacuo yielded 4-(methylthio)-6-methoxy-7-hydroxy-quinazoline (19.18 g, 91% yield):

Provenance & Evidence