Here reports an synthetic method to access polycyclic aromatic hydrocarbons of imidazo[1,2-a]chromeno[3,4-c]pyridine, by palladium-catalyzed oxidative annulation of 3-(1H-benzo[d]imidazol-2-yl)-2H-chromen-2-one with alkenes using benzimidazole as directing group. In addition, their photophysical properties have been well elucidated with improved quantum yields.

中文翻译：

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Pd(II) 催化苯并咪唑辅助的 3-(1H-苯并[d]咪唑-2-基)-2H-苯并咪唑-2-酮成环：获得咪唑并[1,2-a]苯并咪唑[3,4] -c]吡啶

这里报道了一种通过钯催化的3-(1 H-苯并[ d ]咪唑-2-)氧化成环反应获得咪唑并[1,2- a ]色并[3,4- c ]吡啶多环芳烃的合成方法yl)-2 H -chromen-2-one 与烯烃，使用苯并咪唑作为导向基团。此外，随着量子产率的提高，它们的光物理性质也得到了很好的阐明。