反应详情

温度

120 °C

(This method is representative of method F1, F2, F3 and F4. These three methods can be implemented in a similar way except for substitution of the appropriate chlorinating reagent, solvent and temperature) To a mixture of 6-propoxy-2-pyridin-3-yl-1H-quinazolin-4-one (1.00 g, 3.56 mmol) in POCl3 (10 mL) was added N,N-dimethylaniline (0.1 mL). The resulting mixture was stirred at 120° C. for 2 h. After the reaction was completed, POCl3 was removed in vacuo, and the residue was added to ice-water slowly. The pH was adjusted to around 7 by slowly adding NaHCO3 (sat.) at 0 (C. The resultant solid was collected and purified by chromatography on silica gel eluted with petroleum ether/ethyl acetate (v/v=4:1 to 1:1) to give 580 mg of v-a as a pale yellow solid (54.7%).

1. customPOCl3 was removed in vacuo
2. additionthe residue was added to ice-water slowly
3. customThe resultant solid was collected
4. custompurified by chromatography on silica gel
5. washeluted with petroleum ether/ethyl acetate (v/v=4:1 to 1:1)