Dong K, Zhao YL, Jin XL, Liu Q. Indole-Fused Benzoxepine Synthesis via Visible-Light-Driven Aerobic Dehydrogenative [5 + 2] Annulation.
Org Lett 2023;
25:8258-8262. [PMID:
37955358 DOI:
10.1021/acs.orglett.3c03310]
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Abstract
A photocatalyzed oxidative dehydrogenative annulation between 2-(1H-indol-2-yl)phenols and alkenylphenols is presented. Various indole-fused benzoxepines can be obtained at room temperature using atom-efficient strategies. This method not only avoids the use of stoichiometric amounts of oxidants but also exhibits excellent atom economy by generating H2O as the only theoretical byproduct.
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