反应详情

To a stirred solution of 8-isopropoxy-2-methyl-4-phenyl-quinazoline (36) (0.34 mmol) in dichloromethane (2 mL) at −78° C. was added BCl3 (1.36 mL of a 1 M solution in dichloromethane, 1.36 mmol). The reaction mixture was allowed to warm to RT (over 2 h) and stirred for a further 2 h. MeOH (5 mL) was added and the mixture was concentrated to dryness. The process was repeated four times. Further washing of the remaining residue with diethyl ether (2 mL×3) provided 8-hydroxy-2-methyl-4-phenyl-quinazoline (A24).

1. concentrationthe mixture was concentrated to dryness
2. washFurther washing of the remaining residue with diethyl ether (2 mL×3)