Rh<sup>III</sup>-catalyzed annulation of <i>N</i>-methoxyindozamides with heterobicyclic alkenes towards indolo[3,2-<i>c</i>]heteroarenes

<p>A rhodium-catalyzed annulation protocol towards indolo[3,2-<i>c</i>]-1-azaanthraenes and successive treatment with different acids, which offered diverse indolo[3,2-<i>c</i>]-heteroarenes, were herein demonstrated. The transition metal-mediated system offered a direct and facile approach towards the heterocyclic compounds of great significance, enjoying high efficiency and good functional groups compatibility.</p> <p>An annulation reaction between <i>N</i>-methoxyindozamides and heterobicyclic alkenes was herein disclosed. The Rh-Ag-cocatalyzed system offered a direct approach towards various indolo[3,2-<i>c</i>]-1-azaanthraenes in high efficiency and good functional group tolerance. Successive treatment of acids gave different products of great importance.</p>