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Keywords:

  • 4-methylpentene;
  • allylzinc monocation;
  • carbometalation;
  • Lewis acids;
  • metallo-ene reaction
Thumbnail image of graphical abstract

Metal assistance: Dimerization of the allylzinc monocation gives the dimetalated coupling product in quantitative yield (see scheme). Kinetic and thermodynamic parameters of this reversible metallo-ene reaction have been determined. This reaction serves as a model system for the alkali-metal catalyzed production of 4-methylpentene.