C-H to C-N Cross-Coupling of Sulfonamides with Olefins

J Am Chem Soc. 2018 Mar 7;140(9):3202-3205. doi: 10.1021/jacs.7b13492. Epub 2018 Feb 21.

Abstract

Cross-coupling of nitrogen with hydrocarbons under fragment coupling conditions stands to significantly impact chemical synthesis. Herein, we disclose a C(sp3)-N fragment coupling reaction between terminal olefins and N-triflyl protected aliphatic and aromatic amines via Pd(II)/SOX (sulfoxide-oxazoline) catalyzed intermolecular allylic C-H amination. A range of (56) allylic amines are furnished in good yields (avg. 75%) and excellent regio- and stereoselectivity (avg. >20:1 linear:branched, >20:1 E: Z). Mechanistic studies reveal that the SOX ligand framework is effective at promoting functionalization by supporting cationic π-allyl Pd.

Publication types

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

MeSH terms

  • Alkenes / chemical synthesis
  • Alkenes / chemistry*
  • Allyl Compounds / chemical synthesis*
  • Allyl Compounds / chemistry
  • Amination
  • Amines / chemical synthesis*
  • Amines / chemistry
  • Catalysis
  • Palladium / chemistry
  • Stereoisomerism
  • Sulfonamides / chemical synthesis
  • Sulfonamides / chemistry*

Substances

  • Alkenes
  • Allyl Compounds
  • Amines
  • Sulfonamides
  • Palladium