Pd-Catalyzed tandem reaction of <i>N</i>-(2-cyanoaryl)benzamides with arylboronic acids: synthesis of quinazolines
作者:Jianghe Zhu、Yinlin Shao、Kun Hu、Linjun Qi、Tianxing Cheng、Jiuxi Chen
DOI:10.1039/c8ob02421a
日期:——
The synthesis of 2,4-disubstituted quinazolines by a palladium-catalyzed reaction of arylboronic acids with N-(2-cyanoaryl)benzamides has been developed with moderate to excellent yields. The method shows good functional group tolerance. In particular, halogen and hydroxyl substituents, which are amenable for further synthetic elaborations, are well tolerated. Moreover, the present synthetic route
已经开发了通过钯催化的芳基硼酸与N-(2-氰基芳基)苯甲酰胺的反应合成2,4-二取代的喹唑啉,其产率中等至优异。该方法显示出良好的官能团耐受性。特别是,对于进一步的合成修饰而言,卤素和羟基取代基是很好的耐受性。而且,本合成路线可以容易地按比例放大至克量而没有困难。该机制可能涉及亲核加成腈功能,形成亚胺中间体,然后分子内加成酰胺并脱水成喹唑啉环。