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Keywords:

  • allenes;
  • conjugate addition;
  • nickel;
  • reductive coupling;
  • regioselectivity
Thumbnail image of graphical abstract

Alkenes made easy: In a complement to coupling processes of terminal alkynes, the reductive coupling of enones and allenes provides access to conjugate addition products that possess a 1,1-disubstituted alkene (see scheme; cod=1,5-cyclooctadiene). The solvent composition and reducing agent must be carefully matched to allow high levels of regioselectivity to be observed.