Nature-inspired indolyl-2-azabicyclo[2.2.2]oct-7-ene derivatives as promising agents for the attenuation of withdrawal symptoms: synthesis of 20-desethyl-20-hydroxymethyl-11-demethoxyibogaine

Nat Prod Res. 2006 Jul 10;20(8):758-65. doi: 10.1080/14786410500160645.

Abstract

Microwave assisted Diels-Alder cycloaddition of 5-Br-N-benzylpyridinone (2) with methyl acrylate is described to gain an easy access to 7-bromo-2-benzyl-3-oxo-2-aza-5 or 6-carbomethoxy bicyclo[2.2.2]oct-7-enes (3)-(6). The preparation of the ibogaine analogue 20-desethyl-(20-endo)-hydroxymethyl-11-demethoxyibogaine (17) is described by stereoselective hydrogenation of the C(7)-C(8) double bond. Biological evaluation showed an interesting in vitro binding profile toward dopamine transporter, serotonin transporter and opioid receptor systems accompanied by an antiwithdrawal effect in mice for hydroxymethyl 7-indolyl-2-aza-bicyclo[2.2.2]oct-2-ene (14). The simplification of the ibogaine structure appears as a promising approach toward the design of compounds that could reduce the withdrawal symptoms.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Ibogaine / analogs & derivatives*
  • Ibogaine / chemical synthesis
  • Ibogaine / therapeutic use
  • Male
  • Mice
  • Molecular Structure
  • Substance Withdrawal Syndrome / drug therapy*

Substances

  • 20-desethyl-20-hydroxymethyl-11-demethoxyibogaine
  • Ibogaine