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.

中文翻译：

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N-Allenylindoles 和 N-Allenylpyrroles 的碘诱导环化：获得 Iododihydropyrido[1,2-a]indoles 和 Dihydroindolizines

碘化二氢吡啶并[1,2-a]吲哚和二氢吲哚嗪的形成是通过N-烯丙基吲哚和N-烯丙基吡咯的碘碳环化反应实现的。这种转化在非常温和的条件下进行，使用 N-碘代琥珀酰亚胺作为亲电子碘源，通过 6-内环化过程传递产物。必须仔细选择溶剂和浓度才能以良好的收率获得环化。