A metal-free visible-light-induced synthesis of aza-polycyclic aromatic hydrocarbons via cascade alkylation/cyclization of N-methacryloyl-2-phenylbenzimidazole was developed. The reaction was carried out with inactive alkanes and cyclic ethers as alkylation reagents, and phenanthrenequinone (PQ) as a direct hydrogen-atom transfer (HAT) photocatalyst. The desired products were obtained in moderate to good yields at room temperature under air.

中文翻译：

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可见光诱导的 N-甲基丙烯酰基-2-苯基苯并咪唑的自由基级联烷基化/环化：苯并咪唑[2,1-a]异喹啉-6（5H）-酮的可及性


开发了一种无金属可见光诱导的氮杂多环芳烃，通过 N-甲基丙烯酰基-2-苯基苯并咪唑的级联烷基化/环化反应合成氮杂-多环芳烃。反应以无活性烷烃和环醚为烷基化试剂，菲醌 （PQ） 为直接氢原子转移 （HAT） 光催化剂。在室温下、空气中以中等至良好的收率获得所需的产物。