Access to Different Isomeric Dibenzoxazepinones through Copper-Catalyzed C-H Etherification and C-N Bond Construction with Controllable Smiles Rearrangement

Org Lett. 2016 Feb 5;18(3):380-3. doi: 10.1021/acs.orglett.5b03378. Epub 2016 Jan 15.

Abstract

An efficient new way to access two regio-isomeric dibenzoxazepinones is reported from 8-aminoquinoline benzamides and 2-bromophenols. Through choice of conditions, the reaction proceeds either through a sequential C-H etherification and subsequent Goldberg reaction, both controlled by the aminoquinoline group and Cu(I), or via a C-H etherification and subsequent Smiles rearrangement promoted by Cu(II) and t-BuOK. The 8-aminoquinoline moiety, e.g., 8-amino-5-methoxyquinoline, is readily removable from the structures of dibenzoxazepinones under moderate conditions.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aminoquinolines / chemistry*
  • Catalysis
  • Copper / chemistry*
  • Dibenzoxazepines / chemical synthesis*
  • Dibenzoxazepines / chemistry
  • Molecular Structure
  • Phenols / chemistry
  • Stereoisomerism

Substances

  • Aminoquinolines
  • Dibenzoxazepines
  • Phenols
  • Copper