Non-Imidazole Histamine H3 Ligands, Part 2: New 2-Substituted Benzothiazoles as Histamine H3 Antagonists
作者:Krzysztof Walczynski、Roman Guryn、Obbe P. Zuiderveld、Henk Timmerman
DOI:10.1002/(sici)1521-4184(199911)332:11<389::aid-ardp389>3.0.co;2-u
日期:1999.11
New, non‐imidazole histamine H3 receptor antagonists were prepared and in vitro tested as H3 receptor antagonists measured as the electrically evoked contraction of the guinea‐pig jejunum. The 2‐(1‐piperidinyl)‐ and 2‐(1‐pyrrolidinyl)benzothiazoles show no or very poor activity; 2‐[1‐(4‐amino)piperidinyl]‐ and 2‐(1,2‐ethanediamino)‐ and 2‐(1,3‐propanediamino)derivatives of benzothiazole possess weak
制备了新的非咪唑组胺 H3 受体拮抗剂,并作为 H3 受体拮抗剂进行了体外测试,测量结果为豚鼠空肠的电诱发收缩。2- (1-哌啶基) - 和 2- (1- 吡咯烷基) 苯并噻唑没有活性或活性很差;苯并噻唑的 2- [1- (4- 氨基) 哌啶基] - 和 2- (1,2- 乙二氨基) - 和 2- (1,3- 丙二氨基) 衍生物对 H3 受体具有弱活性,而 2- (4-哌啶基) 苯并噻唑和 2-[1- (4-哌嗪基)] 苯并噻唑表现出中等至良好的活性。亲脂性且不太笨重的替代品,如与哌嗪或哌啶环上的氮相连的正丙基,可产生有效的 H3 受体拮抗剂,其 pA2 值范围为 7.0 至 7.2。讨论了不同取代模式的构效关系。