2-(aminomethyl)-oxazolines: highly modular scaffolds for the preparation of novel asymmetric ligands

J Org Chem. 2005 Apr 15;70(8):2921-9. doi: 10.1021/jo048146u.

Abstract

Highly modular chiral 2-(aminoalkyl)oxazolines have been prepared from alpha-amino acids and 1,2-amino alcohols. The amine-functionalized oxazolines were employed as scaffolds in the preparation of a number of different ligands with potential denticities varying from 2 to 5. The obtained ligands were employed and evaluated in the ruthenium-catalyzed asymmetric transfer-hydrogenation of acetophenone and in the titanium-catalyzed addition of diethylzinc to aldehydes. In the latter process, enantioselectivity up to 97% was obtained.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acids / chemistry*
  • Amino Alcohols / chemistry*
  • Catalysis
  • Indicators and Reagents
  • Molecular Structure
  • Oxazoles / chemical synthesis*
  • Oxazoles / chemistry*
  • Ruthenium / chemistry
  • Stereoisomerism
  • Titanium / chemistry
  • Zinc / chemistry

Substances

  • Amino Acids
  • Amino Alcohols
  • Indicators and Reagents
  • Oxazoles
  • Ruthenium
  • Titanium
  • Zinc