50424-28-7

19181-64-7

50424-28-7

Step 2. Synthesis of 4-chloro-6-methoxyquinazoline 0.852 mmol of 6-methoxy-4(1H)-quinazolinone was mixed with 1.022 mmol of phosphorus pentachloride (PCl5) in 0.4 M solution of dichloroethane (DCE). The reaction mixture was reacted in a microwave reactor at 150°C for 400 seconds. After completion of the reaction, the mixture was diluted with dichloromethane (CH2Cl2) and washed sequentially with water and saturated saline. The organic layer was separated, dried over anhydrous magnesium sulfate (MgSO4), filtered and the excess solvent was removed by rotary evaporator to afford 4-chloro-6-methoxyquinazoline in 75% yield. The product was used directly in the subsequent reaction without further purification. m/z = 195 ([M+H]+) was shown by LC-MS analysis.