An efficient [8 + 2]/aryl–ene tandem reaction between azaheptafulvenes and arynes has been developed, leading to the formation of cyclohepta[b]indoles in a single step with good yield. In addition, employment of excess arynes provides a [8 + 2]/aryl–ene /[6 + 2] tandem reaction to synthesize polycyclic oxacyclohepta[b]indoles. This is the first time that azaheptafulvenes have been employed in tandem reactions with arynes.

中文翻译：

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通过与Azaheptafulvenes的多个Aryne反应构建多环吲哚衍生物

已开发了氮杂七叶烯和芳烃之间的有效[8 + 2] /芳基-烯串联反应，导致一步形成环庚[ b ]吲哚并具有良好的收率。另外，使用过量的芳烃可提供[8 + 2] /芳基-烯/ [6 + 2]串联反应，以合成多环氧杂环庚[ b ]吲哚。这是氮杂七富烯首次与芳烃一起用于串联反应。