Abstract

A convenient synthesis of indeno[1,2- c ]isoquinoline-5,11-diones has been achieved using combinational photochemical and carbocationic cyclization tactics. The synthetic route involved first the construction of adequately functionalized N -styryl benz­amides via Suzuki–Miyaura cross-coupling reaction with enol phosphate combined with a six-π-electron photocyclization process. The assembling of the title compounds was readily ensured through sequential carbocationic annulation reaction and ultimate oxidation of a latent hydroxy functionality.

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