Facile and efficient synthesis of quinazoline-2,4(1<i>H</i>,3<i>H</i>)-diones through sequential hydrogenation condensation
作者:Peng-Xu Wang、Ya-Nan Wang、Zi-Yun Lin、Gang Li、Hai-Hong Huang
DOI:10.1080/00397911.2018.1439173
日期:2018.5.19
ABSTRACT The heterocyclizations from various methyl (2-nitrobenzoyl)carbamates to substituted quinazoline-2,4(1H,3H)-diones under hydrogenation conditions were investigated in this study. In the presence of p-toluenesulfonic acid monohydrate in methanol, various quinazoline-2,4(1H, 3H)-diones were obtained in good to excellent yields within 12 h. The reaction was proposed to proceed through the cascade
摘要 本研究研究了在氢化条件下从各种(2-硝基苯甲酰基)氨基甲酸甲酯到取代喹唑啉-2,4(1H,3H)-二酮的杂环化反应。在甲醇中存在对甲苯磺酸一水合物的情况下,在 12 小时内以良好至极好的收率获得了各种喹唑啉-2,4(1H, 3H)-二酮。建议该反应通过硝基还原和缩合的级联反应进行。图形概要