Single-Flask Enantioselective Synthesis of α-Amino Acid Esters by Organocatalysis

Org Lett. 2023 Jul 14;25(27):5038-5043. doi: 10.1021/acs.orglett.3c01736. Epub 2023 Jun 29.

Abstract

An operationally simple Knoevenagel condensation/asymmetric epoxidation/domino ring-opening esterification (DROE) approach has been disclosed to successfully access a good variety of (R)- and (S)-α-arylglycine esters from commercially available aldehydes, phenylsulfonyl acetonitrile, cumyl hydroperoxide, anilines, and readily available Cinchona alkaloid-based catalysts using a single solvent and reaction vessel. DFT calculations performed on the key asymmetric epoxidation showed the importance of cooperative H-bonding interactions in affecting the stereocontrol.

MeSH terms

  • Amino Acids*
  • Catalysis
  • Esterification
  • Esters* / chemistry
  • Stereoisomerism

Substances

  • Esters
  • Amino Acids