5-HT<sub>1B</sub> Receptor Antagonist Properties of Novel Arylpiperazide Derivatives of 1-Naphthylpiperazine
作者:Catherine Jorand-Lebrun、Petrus J. Pauwels、Christiane Palmier、Chantal Moret、Philippe Chopin、Michel Perez、Marc Marien、Serge Halazy
DOI:10.1021/jm9703552
日期:1997.11.1
A new series of arylpiperazide derivatives of 1-naphthylpiperazine of general formula 4 has been prepared and evaluated as 5-HT1B antagonists. Binding experiments at cloned human 5-HT1A, 5-HT1B, and 5-HT1D receptors show that these derivatives are potent and selective ligands for 5-HT1B/1D subtypes with increased binding selectivity versus the 5-HT1A receptor when compared to 1-naphthylpiperazine (1-NP)
Piperazides derived from arylpiperazine, processes for their
申请人:Pierre Fabre Medicament
公开号:US05789412A1
公开(公告)日:1998-08-04
Novel 5HT receptor antagonists of general formula (I) ##STR1## in which Ar.sub.1 and Ar.sub.2 are aromatic residues, X is O, NH, CH.sub.2 O, or CH.sub.2 NH, and R.sub.1 is hydrogen or linear or branched alkyl comprising 1-6 carbon atoms, as well as their salts, hydrates, solvates, and physiologically-acceptable bioprecursors for their therapeutic use, their geometric and optical isomers, and their mixtures in all proportions and in racemic form, methods for the preparation of these novel antagonists, and their use in the treatment of a living animal and pharmaceutical compositions comprising them.
3-Nitrotriazole-based piperazides as potent antitrypanosomal agents
作者:Maria V. Papadopoulou、William D. Bloomer、Howard S. Rosenzweig、Ivan P. O'Shea、Shane R. Wilkinson、Marcel Kaiser
DOI:10.1016/j.ejmech.2015.08.042
日期:2015.10
Novel linear 3-nitro-1H-1,2,4-triazole-based piperazides were synthesized and evaluated as anti-trypanosomal agents. In addition, some bisarylpiperazine-ethanones which were formed as by-products were also screened for antiparasitic activity. Most 3-nitrotriazole-based derivatives were potent and selective against Trypanosoma cruzi parasites, but only one displayed these desired properties against Trypanosoma brucei rhodesiense. Moreover, two 3-nitrotriazole-based chlorophenylpiperazides were moderately and selectively active against Leishmania donovani. Although the bisarylpiperazineethanones were active or moderately active against I cruzi, none of them demonstrated an acceptable selectivity. In general, 3-nitrotriazole-based piperazides were less toxic to host L6 cells than the previously evaluated 3-nitrotriazole-based piperazines and seven of 13 were 1.54- to 31.2-fold more potent antichagasic agents than the reference drug benznidazole. Selected compounds showed good ADMET characteristics. One potent in vitro antichagasic compound (3) was tested in an acute murine model and demonstrated antichagasic activity after a 10-day treatment of 15 mg/kg/day. However, neither compound 3 nor benznidazole showed a statistically significant P value compared to control due to high variability in parasite burden among the untreated animals. Working as prodrugs, 3-nitrotriazole-based piperazides were excellent substrates of trypanosomal type I nitroreductases and constitute a novel class of potentially effective and more affordable antitrypanosomal agents. (C) 2015 Elsevier Masson SAS. All rights reserved.