Synthesis of 2-Aminoquinazolinones via Carbonylative Coupling of <i>ortho</i>-Iodoanilines and Cyanamide
作者:Linda Åkerbladh、Luke R. Odell
DOI:10.1021/acs.joc.6b00249
日期:2016.4.1
describe a convenient and efficient synthesis of 2-aminoquinazolin-4(3H)-ones and N1-substituted 2-aminoquinazolin-4(1H)-ones by a domino carbonylation/cyclization process. The reaction proceeds via carbonylative coupling of readily available ortho-iodoanilines with cyanamide followed by in situ ring closure of an N-cyanobenzamide intermediate. The products were easily isolated by precipitation in moderate
在这里,我们描述了一种通过多米诺羰基化/环化过程方便而有效地合成2-氨基喹唑啉-4(3 H)-one和N1-取代的2-氨基喹唑啉-4(1 H)-one的方法。反应通过容易获得的邻碘苯胺与氰胺的羰基化偶联进行,然后原位闭环N-氰基苯甲酰胺中间体。通过沉淀,可以很容易地以中等到极好的产率分离出各种底物产物,这使它成为2-氨基喹唑啉酮合成的极具吸引力的方法。