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Keywords:

  • 3,3′-pyrrolidonyl spirooxindoles;
  • cycloaddition;
  • methyleneindolinones;
  • organocatalysis;
  • spiro compounds

The authors have noticed several errors in the structures of compounds 3 l3 q in Scheme 6 of their Communication. The corrected version of Scheme 6 is presented below. The authors apologize for these errors and for any inconvenience caused.