Structure and Reactivity of Highly Twisted N-Acylimidazoles

Org Lett. 2019 Apr 5;21(7):2346-2351. doi: 10.1021/acs.orglett.9b00624. Epub 2019 Mar 12.

Abstract

A modular and efficient synthesis of highly twisted N-acylimidazoles is reported. These twist amides were characterized via X-ray crystallography, NMR spectroscopy, IR spectroscopy, and DFT calculations. Modification of the substituent proximal to the amide revealed a maximum torsional angle of 88.6° in the solid state, which may be the most twisted amide reported for a nonbicyclic system to date. Reactivity and stability studies indicate that these twisted N-acylimidazoles may be valuable, namely as acyl transfer reagents.

Publication types

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

MeSH terms

  • Amides / chemistry*
  • Crystallography, X-Ray
  • Imidazoles / chemistry*
  • Magnetic Resonance Spectroscopy
  • Molecular Structure

Substances

  • Amides
  • Imidazoles