Scandium-bipyridine-catalyzed enantioselective aminolysis of meso-epoxides

Chemistry. 2007;13(9):2729-41. doi: 10.1002/chem.200601307.

Abstract

The scandium-bipyridine-catalyzed enantioselective addition of anilines and O-alkyl hydroxylamines to meso-epoxides has been optimized and extended to a broad range of epoxides and amines. Whereas aromatic meso-epoxides generally furnished the corresponding 1,2-amino alcohols in excellent enantioselectivities, aliphatic meso-epoxides only gave rise to moderate enantioselectivities in the aminolysis. The catalyst loading may be lowered to just 5 mol% with only marginal effects on yield and enantioselectivity. A strong positive nonlinear effect has been observed, pointing to aggregation phenomena of the catalyst.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amines / chemistry*
  • Catalysis
  • Epoxy Compounds / chemistry*
  • Pyridines / chemistry*
  • Scandium / chemistry*
  • Stereoisomerism

Substances

  • Amines
  • Epoxy Compounds
  • Pyridines
  • pyridine
  • Scandium