Efficient synthesis of quinazoline-2,4(1H,3H)-diones from CO<sub>2</sub> catalyzed by N-heterocyclic carbene at atmospheric pressure
作者:Yunqing Xiao、Xianqiang Kong、Zhicheng Xu、Changsheng Cao、Guangsheng Pang、Yanhui Shi
DOI:10.1039/c4ra13752c
日期:——
Under atmospheric pressure, quinazoline-2,4(1H,3H)-diones were obtained from the reaction of 2-aminobenzonitriles with carbon dioxide (0.1 MPa) with a catalytic amount of N-heterocyclic carbene in DMSO. It was found that various electron-donating and electron-withdrawing groups such as –OMe, –F, –Cl, –Br, –CH3, –CF3 and –CN were well tolerated to give the products in almost quantitative yields.
在大气压下,由2-氨基苄腈与二氧化碳(0.1 MPa)与催化量的N-杂环卡宾在DMSO中的反应制得喹唑啉-2,4(1 H,3 H)-二酮。发现各种给电子基团和吸电子基团,例如–OMe,–F,–Cl,–Br,–CH 3,–CF 3和–CN都具有良好的耐受性,从而以几乎定量的产率获得了产物。