Characterization of the Binding Site of the Histamine H<sub>3</sub> Receptor. 2. Synthesis, in Vitro Pharmacology, and QSAR of a Series of Monosubstituted Benzyl Analogues of Thioperamide
作者:Albert D. Windhorst、Henk Timmerman、Edward A. Worthington、Greetje J. Bijloo、Paul H. J. Nederkoorn、Wiro M. P. B. Menge、Rob Leurs、Jacobus D. M. Herscheid
DOI:10.1021/jm981106w
日期:2000.5.1
A series of monosubstituted benzyl analogues of the histamine H(3) receptor antagonist thioperamide were synthesized and evaluated for their histamine H(3) receptor activity on the guinea pig jejunum. Incorporation of Cl, Br, and I at the ortho position of the benzyl moiety led to an increase of the pA(2) value, whereas the same substituents at the para position led to a decrease. However, a fluorine
合成了一系列的组胺H(3)受体拮抗剂thioperamide单取代的苄基类似物,并评估了它们对豚鼠空肠的组胺H(3)受体活性。在苄基部分的邻位引入Cl,Br和I导致pA(2)值增加,而对位的相同取代基导致pA(2)值降低。但是,氟取代基使pA(2)的位置大大降低。分子建模揭示了一个QSAR,其pA(2)与硫脲和苄基部分之间的二面角与所计算的取代碳原子上的电子密度之间具有相关性(r = 0.93)。为了验证该QSAR模型是否具有预测价值,对邻叔丁基和甲基类似物进行了合成和评估。