Abstract

The formation of iodinated dihydropyrido[1,2-a]indoles and dihydroindolizines was achieved by an iodocarbocyclization reaction of N-allenylindoles and N-allenylpyrroles. This transformation proceeded under very mild conditions using N-iodosuccinimide as the electrophilic iodine source to deliver the products via a 6-endo cyclization process. Careful choice of the solvent and concentration were mandatory to obtain the cyclization in good yields.

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