Characterization of the Binding Site of the Histamine H<sub>3</sub> Receptor. 1. Various Approaches to the Synthesis of 2-(1<i>H</i>-Imidazol-4-yl)cyclopropylamine and Histaminergic Activity of (1<i>R</i>,2<i>R</i>)- and (1<i>S</i>,2<i>S</i>)-2-(1<i>H</i>-Imidazol-4-yl)- cyclopropylamine
作者:Iwan J. P. De Esch、Roeland C. Vollinga、Kees Goubitz、Henk Schenk、Ulf Appelberg、Uli Hacksell、Sylvia Lemstra、Obbe P. Zuiderveld、Marcel Hoffmann、Rob Leurs、Wiro M. P. B. Menge、Henk Timmerman
DOI:10.1021/jm9810912
日期:1999.4.1
affinity on the histamine H3 receptor. (1S,2S)-Cyclopropylhistamine (VUF 5297) acts as an agonist both on the rat cortex (pD2 = 7.1; alpha = 0.75) and on guinea pig jejunum (pD2 = 6.6; alpha = 0.75). Its enantiomer, (1R, 2R)-cyclopropylhistamine (VUF 5296), is about 1 order of magnitude less active. Both enantiomers show weak activity on H1 and H2 receptors. All synthetic attempts to cis-cyclopropylhistamine
描述了合成2-(1H-咪唑-4-基)环丙胺(环丙基组胺)的所有四个立体异构体的各种方法。据报道,快速,方便地合成和拆分了反式环丙基组胺。其对映异构体的绝对构型通过单晶X射线晶体学分析确定。测试了不同的反式-环丙基组胺对映体的活性和对组胺H3受体的亲和力。(1S,2S)-环丙基组胺(VUF 5297)在大鼠皮层(pD2 = 7.1; alpha = 0.75)和豚鼠空肠(pD2 = 6.6; alpha = 0.75)上均充当激动剂。其对映异构体(1R,2R)-环丙基组胺(VUF 5296)的活性低约1个数量级。两种对映体对H1和H2受体的活性均较弱。顺式-环丙基组胺的所有合成尝试均未成功。尽管如此,这项研究的结果为组胺H3受体配体的分子建模研究提供了理想的模板。