Synthesis and histamine H3-receptor agonist activity of mono- and dialkyl-substituted histamine derivatives
摘要:
In search for potential histamine H-3-receptor agonists a series of mono- and dialkyl-substituted histamine derivatives was synthesized. All target compounds were tested in vitro for their agonist activity at H-3-, H-2-, and H-1-receptors. Introduction of one ethyl or two methyl residues into histamine led to compounds with decreased histamine H-3-agonist potency in most cases. However, the non-chiral alpha,alpha-dimethylhistamine (15) was identified to be three times as active as histamine itself at H-3-receptors. In addition 15 Dimethylhistamine 23, which is a potential metabolite of (alpha R)-alpha-methylhistamine 1, proved to be inactive at all three histamine receptor subtypes.
Struktur-Wirkungs-Beziehungen bei Histaminanaloga, 24. Mitt. Absolute Konfiguration und histaminartige Wirkung der Enantiomere von 4-(2-Aminopropyl)-5-methyl-imidazol
作者:Siegfried Schwarz、Walter Schunack
DOI:10.1002/ardp.19823150804
日期:——
Es werden die Racematspaltung von 4‐(2‐Aminopropyl)‐5‐methyl‐imidazol (1), die Bestimmung der absoluten Konfiguration sowie die histaminartige Wirksamkeit der Enantiomere am Ileum (H1) und Atrium (H2) des Meerschweinchens beschrieben.