Archiv der Pharmazie p. 469 - 472 (1995)
Update date:2022-08-05
Topics:
Kiec-Kononowicz
Ligneau
Schwartz
Schunack
In search of structure-activity relationships among histamine H3-receptor antagonists, the imidazole ring of known H3-receptor antagonists was replaced by different heteroaromatic ring systems. Thus, pyrazoles with ether and carbamate moieties as functional groups were synthesized. Reaction of the hydrochloride of 4-(3-hydroxypropyl)pyrazole with phenyl or benzyl isocyanates mainly gave the carbamates 6 and 7, whereas a similar reaction with 1 as the free base furnished the N-carbamoylpyrazoles 8 and 9. The bifunctional pyrazoles 10 and 11 were formed as by-products. The compounds obtained did not show significant H3-receptor antagonist activity in vitro (rat brain cortex) or in vivo (mouse brain). These results demonstrate the importance of the imidazole moiety for H3-receptor antagonists. The new compounds were also screened for H1-receptor antagonist activity on the isolated guinea-pig ileum and for H2-receptor antagonist activity on the isolated spontaneously beating guinea-pig right atrium. The substances showed only weak antagonistic activity at both histamine receptors H1 and H2.
View MoreJiaxing Taixin Pharmaceutical Chemical Co., Ltd
Contact:0573-82613601
Address:Chemical Park, Jiaxing, Zhejiang, China
Angelisun(Chongqing) Pharmaceutical Co., LTD.
Contact:+86-23-68030926-816
Address:D1-7 Tech & Entrepreneurs Park, Kecheng Road, Erlang Hi-Tech Areas, Chongqing, China
Suzhou BEC Fine Chemicals Co., Ltd.
website:http://www.bek.com.cn
Contact:0512-68095917 18913193865
Address:6, Jin Shan Road, Suzhou New District, 215011 China Suzhou Nations Pharmaceutical Innovation Center Inside
Hangzhou Zyter Biological & Chemical Technology Co., Ltd.
website:http://www.zyterpharm.com
Contact:+86-18858184290
Address:West Wenyi Road, Cangqian, Yuhang
TIANJIN ZHONGXIN CHEMTECH CO.,LTD.
Contact:86-022-89880739
Address:10B, Pan China International Center, No. 931 YingKou Road, TangGu, Tianjin, China, 300451
Doi:10.1248/cpb.15.1331
(1967)Doi:10.1039/j39670002700
(1967)Doi:10.1016/S0040-4039(00)72432-4
(1973)Doi:10.1016/0957-4166(95)00201-Y
(1995)Doi:10.1016/S0960-894X(97)00120-0
(1997)Doi:10.1016/0277-5387(94)00469-U
(1995)