Hydrochloric Acid → HCID 19363363, compound

Participants

Reaction Steps

3-[2-(4-Aminophenyl)ethyl]-7-methoxy-8-pentyloxy-1H-quinazoline-2,4-dione (28.0 g, 70.4 mmol) obtained in Example 7-40 and ethanol (500 ml) were mixed, and the mixture was refluxed under heating until the crystals were completely dissolved. Concentrated hydrochloric acid (5.93 ml, 70.4 mmol) was added dropwise to this solution, and ethanol (200 ml) was further added. The mixture was cooled to room temperature, and the precipitated crystals were collected by filtration to give 3-[2-(4-aminophenyl)ethyl]-7-methoxy-8-pentyloxy-1H-quinazoline-2,4-dione hydrochloride (28.24 g, 92%) as colorless crystals.

Provenance & Evidence