Synthesis of Normorphans through an Efficient Intramolecular Carbamoylation of Ketones

Org Lett. 2015 Aug 7;17(15):3860-3. doi: 10.1021/acs.orglett.5b01832. Epub 2015 Jul 21.

Abstract

An unexpected C-C bond cleavage was observed in trichloroacetamide-tethered ketones under amine treatment and exploited to develop a new synthesis of normophans from 4-amidocyclohexanones. The reaction involves an unprecedented intramolecular haloform-type reaction of trichloroacetamides promoted by enamines (generated in situ from ketones) as counter-reagents. The methodology was applied to the synthesis of compounds embodying the 6-azabicyclo[3.2.1]octane framework.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetamides / chemistry
  • Azabicyclo Compounds / chemical synthesis*
  • Azabicyclo Compounds / chemistry
  • Chloroacetates / chemistry
  • Cyclohexanones / chemistry*
  • Indicators and Reagents
  • Ketones / chemistry*
  • Molecular Structure
  • Stereoisomerism

Substances

  • Acetamides
  • Azabicyclo Compounds
  • Chloroacetates
  • Cyclohexanones
  • Indicators and Reagents
  • Ketones
  • trichloroacetamide