Studies on Antiulcer Drugs. IV. Synthesis and Antiulcer Activities of Imidazo(1,2-a)pyridinylethylbenzothiazoles and -benzimidazoles.
作者:Yousuke KATSURA、Yoshikazu INOUE、Shigetaka NISHINO、Masaaki TOMOI、Hisashi TAKASUGI
DOI:10.1248/cpb.40.1818
日期:——
A series of 6-[2-(imidazo[1, 2-α]pyridin-2-yl)ethyl]benzothiazoles (II) and benzimidazole analogues (III) was synthesized and tested for histamine H2-receptor antagonist, gastric antisecretory and anti-stress ulcer activity. A benzimidazole derivative (IIIa) exhibited strong antisecretory activity, whereas the corresponding benzothiazole derivative (IIb) lacked this potency in in vivo test. In contrast to compound IIIa, however, compound IIb demonstrated good inhibition against stress induced ulcer. The structure-activity relationships of these compounds are discussed.
合成了一系列6-[2-(咪唑并吡啶-2-基)乙基]苯噻唑(II)和苯并咪唑类似物(III),并对它们的组胺H2受体拮抗剂、胃抗分泌和抗压力溃疡活性进行了测试。一种苯并咪唑衍生物(IIIa)显示出强大的抗分泌活性,而相应的苯噻唑衍生物(IIb)在体内测试中缺乏这种效力。然而,与化合物IIIa相比,化合物IIb对压力诱导的溃疡表现出良好的抑制作用。讨论了这些化合物的结构-活性关系。