Simple catalytic mechanism for the direct coupling of α-carbonyls with functionalized amines: a one-step synthesis of Plavix

J Am Chem Soc. 2013 Oct 30;135(43):16074-7. doi: 10.1021/ja4096472. Epub 2013 Oct 16.

Abstract

The direct α-amination of ketones, esters, and aldehydes has been accomplished via copper catalysis. In the presence of catalytic copper(II) bromide, a diverse range of carbonyl and amine substrates undergo fragment coupling to produce synthetically useful α-amino-substituted motifs. The transformation is proposed to proceed via a catalytically generated α-bromo carbonyl species; nucleophilic displacement of the bromide by the amine then delivers the α-amino carbonyl adduct while the catalyst is reconstituted. The practical value of this transformation is highlighted through one-step syntheses of two high-profile pharmaceutical agents, Plavix and amfepramone.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Aldehydes / chemistry
  • Amines / chemistry*
  • Bromides / chemistry
  • Catalysis
  • Clopidogrel
  • Copper / chemistry
  • Diethylpropion / chemical synthesis
  • Esters / chemistry
  • Ticlopidine / analogs & derivatives*
  • Ticlopidine / chemical synthesis

Substances

  • Aldehydes
  • Amines
  • Bromides
  • Esters
  • Copper
  • Clopidogrel
  • Ticlopidine
  • Diethylpropion