Synthesis and histamine H3-receptor agonist activity of mono- and dialkyl-substituted histamine derivatives
作者:R Lipp、H Stark、JM Arrang、M Garbarg、JC Schwartz、W Schunack
DOI:10.1016/0223-5234(96)88228-6
日期:1995.1
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.