Development of an Imine Chaperone for Selective C-H Functionalization of Alcohols via Radical Relay

J Org Chem. 2019 Oct 18;84(20):13065-13072. doi: 10.1021/acs.joc.9b02052. Epub 2019 Sep 12.

Abstract

The design of a radical relay chaperone to promote selective C-H functionalizations is described. A saccharin-based imine was found to be uniquely suited to effect C-H amination of alcohols via an in situ generated hemiaminal. This radical chaperone facilitates the mild generation of an N-centered radical while also directing its regioselective H atom transfer (HAT) to the β carbon of an alcohol. Upon β C-H halogenation, aminocyclization, and reductive cleavage, an NH2 is formally added vicinal to an alcohol. The development, synthetic utility, and chemo-, regio-, and stereoselectivity of this imine chaperone-mediated C-H amination is presented herein.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Alcohols / chemistry*
  • Free Radicals / chemistry
  • Imines / chemical synthesis*
  • Imines / chemistry
  • Molecular Chaperones / chemical synthesis*
  • Molecular Chaperones / chemistry
  • Molecular Structure

Substances

  • Alcohols
  • Free Radicals
  • Imines
  • Molecular Chaperones