Side-arm-promoted highly enantioselective ring-opening reactions and kinetic resolution of donor-acceptor cyclopropanes with amines

J Am Chem Soc. 2012 Jun 6;134(22):9066-9. doi: 10.1021/ja302691r. Epub 2012 May 24.

Abstract

A Ni-catalyzed asymmetric ring-opening reaction of 2-substituted cyclopropane-1,1-dicarboxylates with aliphatic amines has been accomplished using the chiral indane-trisoxazoline (In-TOX) ligand. This highly enantioselective reaction provides an efficient approach to a variety of chiral γ-substituted γ-amino acid derivatives, which are readily transformed into multifunctionalized piperidines and γ-lactams. The single-crystal X-ray structure of the TOX-Ni complex is provided, and the role of the side arm in the chiral ligand is discussed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amines / chemistry*
  • Amino Acids / chemical synthesis*
  • Amino Acids / chemistry
  • Catalysis
  • Crystallography, X-Ray
  • Cyclopropanes / chemistry*
  • Kinetics
  • Models, Molecular
  • Molecular Structure
  • Nickel / chemistry
  • Organometallic Compounds / chemistry
  • Stereoisomerism

Substances

  • Amines
  • Amino Acids
  • Cyclopropanes
  • Organometallic Compounds
  • Nickel