反应详情

To 20 ml of tetrahydrofuran were added 1.16 g of 4-amino-6,7-dimethoxy-2-(1-piperazinyl)quinazoline and 1.5 g of triethylamine. There was then added 0.52 g of 2,4-hexadienoyl chloride, after which the mixture was stirred at room temperature for 3 hours. The reaction mixture was then concentrated by evaporation under reduced pressure, and the resulting residue was washed with water and recrystallized from ethanol, to give 1.3 g of the desired Compound No. 10 in the form of pale yellow powdery crystals melting at 231°-233° C.

1. concentrationThe reaction mixture was then concentrated by evaporation under reduced pressure
2. washthe resulting residue was washed with water
3. customrecrystallized from ethanol