Metal- and Oxidant-Free Synthesis of Quinazolinones from <i>β</i>-Ketoesters with <i>o</i>-Aminobenzamides via Phosphorous Acid-Catalyzed Cyclocondensation and Selective C–C Bond Cleavage
作者:Zhongwen Li、Jianyu Dong、Xiuling Chen、Qiang Li、Yongbo Zhou、Shuang-Feng Yin
DOI:10.1021/acs.joc.5b00937
日期:2015.10.2
and efficient phosphorous acid-catalyzed cyclocondensation of β-ketoesters with o-aminobenzamides via selective C–C bond cleavage leading to quinazolinones is developed. This reaction proceeds smoothly under metal- and oxidant-free conditions, giving both 2-alkyl- and 2-aryl-substituted quinazolinones in excellent yields. This strategy can also be applied to the synthesis of other N-heterocycles, such
通过选择性的CC键裂解产生喹唑啉酮,开发了一种通用且有效的亚磷酸催化β-酮酯与邻氨基苯甲酰胺的环缩合反应。该反应在无金属和无氧化剂的条件下顺利进行,从而以优异的收率得到2-烷基和2-芳基取代的喹唑啉酮。该策略也可以用于合成其他N-杂环,例如苯并咪唑和苯并噻唑。