Design, synthesis and biological activity of rigid cannabinoid CB1 receptor antagonists

被引:59
|
作者
Stoit, AR [1 ]
Lange, JHM [1 ]
den Hartog, AP [1 ]
Ronken, E [1 ]
Tipker, K [1 ]
van Stuivenberg, HH [1 ]
Dijksman, JAR [1 ]
Wals, HC [1 ]
Kruse, CG [1 ]
机构
[1] Solvay Pharmaceut Res Labs, NL-1380 DA Weesp, Netherlands
关键词
benzocycloheptapyrazole; CB1 receptor antagonist; molecular modeling; regiochemistry;
D O I
10.1248/cpb.50.1109
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
The design, synthesis and biological activities of potent pyrazole-based tricyclic CB1 receptor antagonists (2) are described. The key synthetic step involves the ring closure of the lithiated alpha,gamma-keto ester adduct (4). The optimal nitroderivative (28) in this series exhibits a high CB1 receptor affinity (pK(i)=7.2) as well as very potent antagonistic activity (pA(2)=8.8) in vitro. The regioselectivity of the pyrazole ring closure is shown to depend strongly on the aromatic substitution pattern of the applied arylhydrazine.
引用
收藏
页码:1109 / 1113
页数:5
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