Abstract 2-Aminobenzaldehyde, 1-(2-aminophenyl)ethanone, and 2-aminophenyl phenyl methanone oximes 1 were reacted with aromatic aldehydes to give the corresponding 1,2-dihydroquinazoline-3-oxides 2. The latter were converted in high yields to a series of quinazoline-3-oxides 3 using an environmentally benign H2O2-tungstate oxidant system at room temperature. A high yielding one-pot procedure was also
摘要 2-氨基苯甲醛、1-(2-氨基苯基)乙酮和2-氨基苯基苯基甲酮肟1与芳香醛反应得到相应的 1,2-二氢喹唑啉-3-氧化物2。后者在室温下使用环境友好的 H 2 O 2 -钨酸盐氧化剂系统以高产率转化为一系列喹唑啉-3-氧化物3。还开发了一种用于合成化合物3 的高产一锅法。