Enantioselective Construction of Chiral Bispiro[Oxindole-Pyrrolidine-Pyrazolone] Derivatives via Sequential and One-Pot Mannich/Hydroamination Reaction

J Org Chem. 2021 Dec 17;86(24):18139-18155. doi: 10.1021/acs.joc.1c02428. Epub 2021 Dec 1.

Abstract

The atom-economic method for the preparation of novel bispirocyclic compounds containing three fused heterocyclic scaffolds privileged in drug discovery was developed by using a chiral amine-squaramide Mannich reaction and Au(I)-catalyzed hydroamination. The developed synthetic strategy performed either stepwise or as a one-pot process allows the formation of chiral bispirocyclic [oxindole-pyrrolidine-pyrazolones] in high yields (up to 75%) with excellent enantioselectivities (up to 99%).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Molecular Structure
  • Oxindoles
  • Pyrazolones*
  • Pyrrolidines
  • Stereoisomerism

Substances

  • Oxindoles
  • Pyrazolones
  • Pyrrolidines