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Keywords:

  • acyl chlorides;
  • cyclization;
  • enantioselectivity;
  • spiro compounds
Thumbnail image of graphical abstract

Cinchona alkaloids were used as Lewis base catalysts in the title reaction. The [4+2] cyclization of α,β-unsaturated acyl chlorides with electron-deficient alkenes derived from oxindole gave the corresponding spirocarbocyclic oxindoles.