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Development of an Alkyne Analogue of the de Mayo Reaction: Synthesis of Medium‐Sized Carbacycles and Cyclohepta[ b ]indoles

Tymann, David ; Tymann, Dina Christina ; Bednarzick, Ulf ; Iovkova‐Berends, Ljuba ; Rehbein, Julia ; Hiersemann, Martin


Embedded medium-sized carbacycles and cyclohepta [b] indoles occur frequently as scaffold elements in natural products and bioactive compounds. Described herein is a conceptionally novel photochemically triggered cascade process to these scaffolds. Key to the cascading ring-expansion process is an unprecedented intramolecular alkyne analogue of the de Mayo reaction.

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