Palladium‐Catalyzed Oxidative Cross‐Coupling of N‐Tosylhydrazones or Diazoesters with Terminal Alkynes: A Route to Conjugated Enynes

Coming at them from another angle: In a fresh approach to the synthesis of conjugated alkynes, the palladium-catalyzed cross-coupling of N-tosylhydrazones or diazoesters with terminal alkynes provided the desired enyne products with excellent stereoselectivity (see scheme; Ts=p-toluenesulfonyl). The reaction is proposed to involve an unprecedented alkynyl migratory insertion of a palladium carbene complex. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.