- NOVEL AMINO- AND IMINO-ALKYLPIPERAZINES
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Described are novel amino- and iminoalkyl piperazines having affinity for serotonergic receptors and pharmacological compositions thereof. These compounds and their isomers, including optical isomers, enantiomers, diastereomers, N-oxides, polymorphs, hydr
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Page/Page column 27
(2010/11/29)
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- N-Arylpiperazinyl-N'-propylamino derivatives of heteroaryl amides as functional uroselective α1-adrenoceptor antagonists
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Novel arylpiperazines were identified as α1-adrenoceptor (AR) subtype- selective antagonists by functional in vitro screening. 3-[4-(ortho- Substituted phenyl)piperazin-1:yl]propylamines were derivatized with N,N- dimethyl anthranilamides, nicotinamides, as well as carboxamides of quinoline, 1,8-naphthyridine, pyrazolo[3,4-b]pyridine, isoxazolo[3,4- b]pyridine, imidazo[4,5-b]pyridine, and pyrazolo[1,5-a]pyrimidines. Strips of rabbit bladder neck were employed as a predictive assay for antagonism in the human lower tract. Rings of rat aorta were used as a 'negative screen' for the test antagonists. Binding to α1-ARs was relatively sensitive to size and electronic features of the arylpiperazine portion of the antagonists and permissive to these features on the heteroaryl carboxamide side. These structure-affinity findings were exploited to produce nicotinamides (e.g. 13ii and 25x) and pyrazolo[3,4-b]pyridines (e.g. 37f and 37y) ligands with nanomolar affinity at the α1-AR subtype prevalent in the human lower urinary tract (pA2 values: 8.8, 10.7, 9.3, and 9.9, respectively) and displaying 2-3 orders of magnitude selectivity over the α(1D)-AR.
- Elworthy, Todd R.,Ford, Anthony P. D. W.,Bantle, Gary W.,Morgans Jr., David J.,Ozer, Rachel S.,Palmer, Wylie S.,Repke, David B.,Romero, Magarita,Sandoval, Leticia,Sjogren, Eric B.,Talamás, Francisco X.,Vazquez, Alfredo,Wu, Helen,Arredondo, Nicolas F.,Blue Jr., David R.,DeSousa, Andrea,Gross, Lisa M.,Kava, M. Shannon,Lesnick, John D.,Vimont, Rachel L.,Williams, Timothy J.,Zhu, Quan-Ming,Pfister, Jürg R.,Clarke, David E.
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p. 2674 - 2687
(2007/10/03)
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- [3-(4-phenylpiperazin-1-yl)propyl-amino, thio and oxy]-pyridine, pyrimidine and benzene derivatives as α1 -adrenoceptor antagonists
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The present invention relates to novel α 1 -adrenoceptor antagonists of Formula I: STR1 in which: p is 0 or 1;t is 0, 1 or 2;X is O, S or NR 6 (in which R 6 is hydro or (C 1-6)alkyl);Y and Z are independently CH or N;R 1 is hydro, hydroxy, halo, nitro, amino, cyano, (C 1-4)alkylthio, acetylamino, trifluoroacetylamino, methylsulfonylamino, (C 1-6)alkyl, (C 3-6)cycloalkyl, (C 3-6)cycloalkyl (C 1-4)alkyl, oxazol-2-yl, aryl, heteroaryl, aryl (C 1-4)alkyl, heteroaryl (C 1-4)alkyl, (C 1-6)alkyloxy, (C 3-6)cycloalkyloxy, (C 3-6)cycloalkyl (C 1-4)alkyloxy, 2-propynyloxy, aryloxy, heteroaryloxy, aryl (C 1-4)alkyloxy or heteroaryl (C 1-4)alkyloxy (wherein alkyl is optionally substituted with one to three halo atoms and aryl or heteroaryl is optionally substituted with one to two substituents independently selected from halo and cyano);R 2 is hydro, hydroxy, halo, cyano, (C 1-6)alkyl or (C 1-6)alkyloxy (wherein alkyl is optionally substituted with one to three halo atoms);R 3 is -C (O)R 7 (wherein R 7 is (C 1-6)alkyl, (C 3-6)cycloalkyl, di(C 1-4)alkylamino, N-(C 1-4)alkyl-N-(C 1-4)alkyloxyamino, (C 1-4)alkyl((C 1-4)alkyloxy)amino, pyrrolidin-1-yl, piperidin-1-yl, morpholin-4-yl or piperazin-1-yl);R 4 is halo, hydroxy, cyano, (C 1-6)alkyl or (C 1-6)alkyloxy; andR 5 is (C 1-6)alkyl; and the pharmaceutically acceptable salts and N-oxides thereof.
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