Molecules (Aug 2015)

New Organocatalytic Asymmetric Synthesis of Highly Substituted Chiral 2-Oxospiro-[indole-3,4′- (1′,4′-dihydropyridine)] Derivatives

  • Fernando Auria-Luna,
  • Eugenia Marqués-López,
  • Somayeh Mohammadi,
  • Roghayeh Heiran,
  • Raquel P. Herrera

DOI
https://doi.org/10.3390/molecules200915807
Journal volume & issue
Vol. 20, no. 9
pp. 15807 – 15826

Abstract

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Herein, we report our preliminary results concerning the first promising asymmetric synthesis of highly functionalized 2-oxospiro-[indole-3,4′-(1′,4′-dihydropyridine)] via the reaction of an enamine with isatylidene malononitrile derivatives in the presence of a chiral base organocatalyst. The moderate, but promising, enantioselectivity observed (30%–58% ee (enantiomeric excess)) opens the door to a new area of research for the asymmetric construction of these appealing spirooxindole skeletons, whose enantioselective syntheses are still very limited.

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