Structure-activity relationships associated with 3,4,5-triphenyl-1H-pyrazole-1-nonanoic acid, a nonprostanoid prostacyclin mimetic
摘要:
A series of phenylated pyrazoloalkanoic acid derivatives were synthesized and evaluated as inhibitors of ADP-induced human platelet aggregation. 3,4,5-Triphenyl-1H-pyrazole-1-nonanoic acid (8d), with an 1C50 of 0.4-mu-M, was the most potent inhibitor identified in this study. Biochemical studies determined that 8d increased intraplatelet cAMP accumulation and stimulated platelet membrane-bound adenylate cyclase in a concentration-dependent fashion. Displacement of [H-3]iloprost by 8d from platelet membranes indicated that the platelet prostacyclin (PGI2) receptor is the locus of biological action. Structure-activity studies demonstrated that the minimum structural requirements for binding to the platelet PGI2 receptor and inhibition of ADP-induced platelet aggregation within this series are a vicinally diphenylated pyrazole substituted with an omega-alkanoic acid side chain eight or nine atoms long. Potency depended upon both side-chain length and its topological relationship with the two phenyl rings.
Nitrogen-containing heterocyclic compounds represented by the following Formula (1) are provided. The compounds or salts thereof have a strong EP1 antagonistic activity when they are administered to a human or an animal, and they are useful as an effective component of a pharmaceutical agent for prophylaxis and/or treatment of an overactive bladder, for example. Furthermore, they are useful as an effective component of a pharmaceutical agent for the prophylaxis and/or treatment of symptoms including frequent urination, urinary urgency and urinary incontinence.
Regioselective One-Step Synthesis of Pyrazoles from Alkynes and N-Tosylhydrazones: [3+2] Dipolar Cycloaddition/[1,5] Sigmatropic Rearrangement Cascade
作者:M. Carmen Pérez-Aguilar、Carlos Valdés
DOI:10.1002/anie.201301284
日期:2013.7.8
Rearrangement under control: A wide variety of 3,4,5‐ and 1,3,5‐trisubstituted pyrazoles can be prepared from tosylhydrazones of ketones and terminal alkynes through the title reaction sequence (see scheme; Ts=4‐toluenesulfonyl). The rearrangement, and therefore, the regioselectivity of the reaction is controlled by the nature of the substituents of the tosylhydrazone.
Nitrogen-containing heterocyclic compounds represented by the following Formula (1) are provided. The compounds or salts thereof have a strong EP1 antagonistic activity when they are administered to a human or an animal, and they are useful as an effective component of a pharmaceutical agent for prophylaxis and/or treatment of an overactive bladder, for example. Furthermore, they are useful as an effective component of a pharmaceutical agent for the prophylaxis and/or treatment of symptoms including frequent urination, urinary urgency and urinary incontinence.
We describe a medicinal chemistry approach for generating a series of 2-(1H-pyrazol-1-yl)thiazoles as EP1 receptor antagonists. To improve the physicochemical properties of compound 1, we investigated its structure-activity relationships (SAR). Optimization of this lead compound provided small compound 25 which exhibited the best EP1 receptor antagonist activity and a good SAR profile. (C) 2013 Elsevier Ltd. All rights reserved.
v. Auwers; Bergmann, Justus Liebigs Annalen der Chemie, 1929, vol. 472, p. 310