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Keywords:

  • allenes;
  • carbenes;
  • cross-coupling;
  • diazo compounds;
  • multicomponent reactions
Thumbnail image of graphical abstract

'Diene' to know: The title reaction leads to the formation of 1,3-dienes in high yields (see scheme). The reaction also proceeds with the use of N-tosylhydrazone substrates. Carbopalladation to the allene and palladium carbene migratory insertion are proposed to play the key role in this transformation.