Potassium Hydroxide → 2-(4-Cyanopiperazin-1-yl)-4-amino-6,7-dimethoxyquinazoline

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Reaction Steps

In a flask fitted with stirrer, thermometer, and drying tube is placed 100 ml. of chloroform, 12.0 g. (0.05 mole) of 4-amino-2-bromo-6,7-dimethoxyquinazoline (prepared by the method of U.S. Pat. No. 3,511,836) and 5.8 g. (0.052 mole) of 1-cyanopiperazine. The mixture is maintained at 50° C. for 24 hours after which 2N potassium hydroxide solution is added at room temperature to adjust to pH 9.5. The organic layer is separated and the aqueous phase extracted again with chloroform and the combined extracts are evaporated to dryness to obtain 2-(4-cyanopiperazin-1-yl)-4-amino-6,7-dimethoxyquinazoline.

Provenance & Evidence