反应详情

In 10 ml of dimethylformamide was dissolved 400 mg (1.46 mmol) of 6,7-dimethoxy-4-piperazinylquinazoline obtained according to the method described in South African Patent No. 67 06512 (1968), and 1.02 ml (7.32 mmol) of triethylamine was added thereto. To the resulting mixture was added 406 mg (1.75 mmol) of diphenylcarbamoyl chloride, followed by overnight stirring at room temperature. After the reaction mixture was poured into water, the precipitated crystals were collected by filtration, followed by purification by silica gel column chromatography to give 680 mg of the desired compound as colorless crystals.

1. customobtained
2. filtrationthe precipitated crystals were collected by filtration
3. customfollowed by purification by silica gel column chromatography