A new type of three-component reaction of air-stable isochromenylium tetrafluoroborates with electron-rich stilbenes in acetonitrile has been developed under catalyst-free conditions in this work. This cascade multibond-formation reaction is initiated by an intermolecular oxa [4 + 2]-cycloaddition, relayed with a nucleophilic addition of acetonitrile, and terminated by an intramolecular Friedel–Crafts
在这项工作中,在无催化剂条件下,开发了一种新型的空气稳定的四
氟硼酸异
铬腈与
乙腈中富含电子的
对苯二甲酸酯的三组分反应。这种级联的多键形成反应由分子间的氧杂[4 + 2]-环加成反应引发,再与
乙腈进行亲核加成反应,再由分子内的Friedel-Crafts反应终止,一步即可得到相应的苯并[ c ]
菲啶类似物。