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Keywords:

  • asymmetric catalysis;
  • catalysts;
  • cycloaddition;
  • diazo compounds;
  • rhodium

Graphical Abstract

Thumbnail image of graphical abstract

Ask more of your catalyst! Herein is described the evolution of chiral rhodium catalysts that not only are able to form carbonyl ylides from diazo substrates, but are also capable of remaining associated with the ylide to effect efficient asymmetric cycloaddition (see scheme).

Abstract

Catalytic, enantioselective, tandem carbonyl ylide formation/cycloaddition of 2-diazo-3,6-diketoester 2 with the use of dirhodium tetrakiscarboxylate and tetrakisbinaphtholphosphate catalysts to give the cycloadducts 3 in good yields and up to 90 % ee is described.