Synthesis of pyridylallylamines related to zimelidine and their inhibition of neuronal monoamine uptake

J Med Chem. 1981 Dec;24(12):1499-507. doi: 10.1021/jm00144a025.

Abstract

Analogues of the antidepressant agent zimelidine [6, (Z)-3-(4-bromophenyl)-N,N-dimethyl-3-(3-pyridyl)allylamine], a selective inhibitor of neuronal 5-hydroxytryptamine reuptake, were synthesized by several routes with the aim of obtaining compounds having a cis configuration (with respect to pyridyl and allylamine). Two methods utilized suitably substituted benzoylpyridines as starting materials. In two other routes, the bromine in 6 was either directly displaced (CN) or converted via the corresponding lithio derivative to H, Cl, I, Me, SiMe3, and SMe. The configurations were determined by UV, 1H NMR, and lanthanide-induced shifts in 1H NMR. The compounds were evaluated as uptake inhibitors by measuring the accumulation of [3H]noradrenaline and 5-hydroxy[14C]tryptamine in mouse brain slices (in vitro and in vivo). Para substitution favored 5-hydroxytryptamine activity and ortho substitution favored NA activity in the cis series. The in vitro effect on 5-hydroxytryptamine was rather insensitive to variations in the para substituent, whereas pronounced effects in vivo were observed only with Cl, Br (6), and I.

MeSH terms

  • Animals
  • Biogenic Amines / metabolism*
  • Brain / metabolism
  • Brompheniramine / analogs & derivatives
  • Brompheniramine / chemical synthesis
  • Brompheniramine / metabolism
  • Chemical Phenomena
  • Chemistry
  • In Vitro Techniques
  • Male
  • Mice
  • Molecular Conformation
  • Neurons / drug effects*
  • Neurons / metabolism
  • Norepinephrine / metabolism
  • Pyridines / chemical synthesis*
  • Pyridines / metabolism
  • Serotonin / metabolism
  • Structure-Activity Relationship
  • Zimeldine

Substances

  • Biogenic Amines
  • Pyridines
  • Serotonin
  • Zimeldine
  • Brompheniramine
  • Norepinephrine