Abstract
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.
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