Benzimidazoles as NMDA Glycine-Site Antagonists: Study on the Structural Requirements in 2-Position of the Ligand
摘要:
A series of different substituted benzimidazole derivatives has been synthesized and evaluated for the ability to displace [3H]MDL-105,519 to rat cortical membranes. Two benzimidazole-2-carboxylic acids 9 b and 9 c, in this substitution pattern not yet described as glycine antagonists, showed IC50 values of 0.89 microM (9 b) and 38.0 microM (9 c). Replacement of the carboxylate function in 2-position by a sulfonic acid moiety appreciably increased solubility, but decreased the affinity giving evidence for the strong need of the carboxylate group within the ligand. Further structure-activity studies using benzimidazole-2-one derivatives with an acetic acid moiety adjacent to a ring nitrogen revealed new insights into the importance of amide functionalities within the heterocycle for the affinity of antagonist glycine-site ligands.
Synthesis, antiprotozoal and anticancer activity of substituted 2-trifluoromethyl- and 2-pentafluoroethylbenzimidazoles
作者:M Andrzejewska
DOI:10.1016/s0223-5234(02)01421-6
日期:2002.12.1
The synthesis of several halogenated benzimidazoles substituted in position 2 with trifluoromethyl, pentafluoroethyl and 2-thioethylaminodimethyl group is reported. Antiprotozoal and anticancer activity of series of newly synthesized and previously obtained compounds was studied. All of tested bezimidazoles showed remarkable antiprotozoalactivity against Giardia intestinalis, Entamoeba histolytica
A series of substituted 2-polyfluoroalkyl and 2-nitrobenzylsulphanyl benzimidazoles was synthesized. The compounds were evaluated for their activity against four Mycobacterium strains; the activities were expressed as the minimum inhibitory concentration (MIC). The substances tested showed appreciable antimycobacterial activity, particularly 5,6-dichloro-2-nonafluorobutylbenzimidazole (2h), and 5-halogeno-(5a-c) and 4,6-dihalogeno- (5d and 5g) 2-(3,5-dinitrobenzylsulphanyl)benzimidazoles, whose MIC values for Mycobacterium kansasii and Mycobacterium avium exceeded that of isoniazide that was used as a reference compound. Relationships between structure and biological activity of the tested benzimidazole derivatives are discussed. (C) 2004 Elsevier SAS. All rights reserved.
Synthesis, and antiprotozoal and antibacterial activities of S-substituted 4,6-dibromo- and 4,6-dichloro-2-mercaptobenzimidazoles
作者:Mariola Andrzejewska、Lilian Yepez-Mulia、Amparo Tapia、Roberto Cedillo-Rivera、Agnieszka E. Laudy、Bohdan J. Starościak、Zygmunt Kazimierczuk
DOI:10.1016/j.ejps.2003.10.024
日期:2004.2
The synthesis and some germicidal activities in vitro of two congener series of S-substituted 4,6-dihalogeno-2-mercapto-1H-benzimidazoles are reported. There was no substantial difference between antibacterial activities of corresponding 4,6-dichloro- and 4,6-dibromo-derivatives. The present results confirm lower susceptibility to substituted benzimidazoles of Gram-negative compared to Gram-positive bacteria. Minimum inhibitory concentrations (MICs) of a majority of the novel derivatives ranged between 25 and 100 mug/ml for Gram-positive bacteria. The most active compounds (MICs for Gram-positive bacteria: 0.78-50 mug/ml) were 4,6-dichloro-2-(4-nitrobenzylthio)-1H-benzimidazole and 4,6-dibromo-2-(4-nitrobenzylthio)-1H-benzimidazole that were 4-32 times more potent than nitrofurantoin against all Gram-positive bacteria utilized but Escherichia faecalis, against which they were, respectively, 2 and 4 times less potent than nitrofurantoin. Among Gram-negative bacteria used, Stenotrophomonas maltophilia and Bordetella bronchiseptica were most sensitive (as evidenced by a number of MICs less than or equal to 100 mug/ml), whereas Pseudomonas aeruginosa was most resistant to the new benzimidazole derivatives (all MICs > 400 mug/ml). All the new compounds were at least several times more active against Giardia intestinalis (IC50: 0.006-0.053 mug/ml), and a half of them were at least several times more active against Trichomonas vaginalis (IC50: 0.0015-0.182 mug/ml) than metronidazole (IC50: 0.210 and 0.037 mug/ml, respectively), the drug of choice in the treatment of G. intestinalis and T. vaginalis infections. (C) 2003 Elsevier B.V. All rights reserved.
SHARMA, B. R.;PUJARI, H. K., INDIAN J. CHEM. B, 27,(1988) N 2, C. 121-127
作者:SHARMA, B. R.、PUJARI, H. K.
DOI:——
日期:——
COMPOUNDS, COMPOSITIONS COMPRSING SAME, AND METHODS RELATED THERETO
申请人:UNIVERSITY OF IOWA RESEARCH FOUNDATION
公开号:US20160115136A1
公开(公告)日:2016-04-28
Disclosed herein are compounds, such as benzimidazole derivatives, and composition, such as pharmaceutical compositions, and methods related thereto for treating or preventing microbial infections. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.