1·The five quinazoline compounds were prepared by using 2 amino 4,5 dimethoxy benzoic acid as original material, which underwent ring closing, halogenation and substitution.
方法：以2 氨基4 ，5 二甲氧基苯甲酸为原料，分别经过环化、氯代、取代等反应，合成了五种目标化合物。