An efficient silver catalyzed annulation reaction of aryne with nitriles to generate quinazolines is described. Arynes generated from triynes or tetraynes through a hexadehydro Diels-Alder reaction readily participated in an [A + 2B] mode of annulation with nitriles in the presence of AgSbF6 catalyst. The mechanism was explored by DFT calculations, which supports the silver-catalyzed formation of nitrilium
                                    描述了
炔烃与腈的有效
银催化环化反应以生成
喹唑啉。在AgSbF6催化剂的存在下,通过六氢Diels-Alder反应由三炔或四炔生成的
芳烃很容易参与腈的环化[A + 2B]模式。通过DFT计算探索了该机理,该机理支持
银催化的腈离子作为关键中间体的形成。这种成环反应产生了具有优良区域选择性的多取代的新型
喹唑啉衍
生物阵列。