Synthesis, Cannabinoid Receptor Affinity, and Molecular Modeling Studies of Substituted 1-Aryl-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamides
摘要:
The new 1-phenyl-5-(1H-pyrrol-1-yl)pyrazole-3-carboxamides were compared with the reference compounds AM251 and SR144528 for cannabinoid hCB(1) and hCB(2) receptor affinity. Compounds bearing 2,4-dichlorophenyl or 2,4-difluorophenyl groups at position 1 and 2,5-dimethylpyrrole moiety at position 5 of the pyrazole nucleus were generally more selective for hCB(1). On the other hand, the N-cyclohexyl group at the 3-carboxamide was the determinant for the hCB2 selectivity, in particular when a 3,4-dichlorophenyl group was also present at position 1. Compound 26 was the most selective ligand for the hCB(1) receptor (K-i (CB2)/K-i (CB1) = 140.7). Derivative 30, the most potent hCB(1) ligand (Ki = 5.6 nM), was equipotent to AM251 and behaved as an inverse agonist in the cAMP assay (EC50 similar to 1 nM). The carbonyl oxygen of both 26 and 30 formed a H-bond with K3.28(192), while the substituents at the nitrogen fitted in a pocket formed by lipophilic residues. This H-bonding interaction was proposed to account for the high affinity for receptors' inactive state and the inverse agonist activity.
1,3,5-trisubstituted 4,5-dihydro-1H-pyrazole derivatives having CB1-antagonistic activity
申请人:Lange H.M. Josephus
公开号:US20050171179A1
公开(公告)日:2005-08-04
The present invention relates to 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazole derivatives as CB
1
antagonists, to methods for the preparation of these compounds and to novel intermediates useful for the synthesis of said pyrazole derivatives. The invention also relates to the use of a compound disclosed herein for the manufacture of a medicament giving a beneficial effect.
The compounds have the general formula (I)
wherein the symbols have the meanings given in the specification.
Pyrazolines and their intermediates, including all geometric and stereoisomers of the pyrazolines and intermediates, agricultural compositions containing the pyrazolines, and methods for use as insecticides.
[EN] SPIROCYCLIC DERIVATIVE OF 4,5-DIHYDROPYRAZOLO[3,4-C]PYRIDINE-2-ONE, PREPARATION METHOD AND USE THEREOF<br/>[FR] DÉRIVÉ SPIROCYCLIQUE DE 4,5-DIHYDROPYRAZOLO[3,4-C]PYRIDINE-2-ONE ET PROCÉDÉ DE PRÉPARATION ET D'UTILISATION ASSOCIÉ
In this study some cycloalkyl-3-(N-substituted carbamoyl)-1-phenylpyrazoles have been synthesized in order to screen their capability to inhibit human cyclooxygenase. The synthetic pathway is based on the well known property of nitrilimines to undergo 1,3-dipolar cycloaddition reactions. The structures of all the synthesized compounds have been elucidated by means of both analytical and spectroscopic methods. (C) 1998 Elsevier Science S.A. All rights reserved.