Tetrahydrocarbazoles and perhydrocyclohepta[b]indoles undergo a catalytic cascade singlet oxygenation in alkaline medium, which leads to chiral tricyclic perhydropyrido‐ and perhydroazepino[1,2‐a]indoles in a single operation. These photooxygenation products are new synthetic equivalents of uncommon C,N‐diacyliminium ions and can be functionalized with the aid of phosphoric acid organocatalysis.

中文翻译：

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四氢咔唑和环庚[b]吲哚的可见光级联光氧化：获得C，N-二酰基亚胺离子。

四氢咔唑和全氢环庚[b]吲哚在碱性介质中经历催化级联单线态氧合反应，这会在一次操作中导致手性三环全氢吡啶并全氢哌啶[1,2-a]吲哚。这些光氧化产物是不常见的C，N-二酰基亚胺离子的新合成等价物，可以借助磷酸有机催化进行功能化。