Privileged Scaffolds or Promiscuous Binders: A Comparative Study on Rhodanines and Related Heterocycles in Medicinal Chemistry
作者:Thomas Mendgen、Christian Steuer、Christian D. Klein
DOI:10.1021/jm201243p
日期:2012.1.26
campaigns, we decided to perform a systematic study on their promiscuity. An amount of 163 rhodanines, hydantoins, thiohydantoins, and thiazolidinediones were synthesized and tested against several targets. The compounds were also characterized with respect to aggregation and electrophilic reactivity, and the binding modes of rhodanines and relatedcompounds in published X-ray cocrystal structures were analyzed
Series of novel 5-arylidene-2-arylaminothiazol-4(5H)-ones and 2-aryl(benzyl)amino-1H-imidazol-4(5H)ones were synthesized from appropriate 2-alkylthioazol-4-ones using nucleophilic substitution in position 2 by various anilines and benzylamines and Knoevenagel reaction. X-ray structural studies of 22 revealed the structure to be intermediate between amino and imino tautomeric forms. All the target compounds were evaluated for the anticancer activity in vitro in standard National Cancer Institute 60 cancer cell lines assay. Majority of compounds showed significant antitumor cytotoxicity effect at micromolar and submicromolar level (Mean Log GI(50) ranges -5.77 to -4.35). Some of the most potent compounds, namely 10 and 13, possessed selectively high effect on all leukemia cell lines at submicromolar level (Mean Log GI50 [leukemia lines], respectively, -6.41 and -6.29), which are probably associated with immunosuppressive activity. Individual cancer cell lines sensitivity to synthesized compounds and SAR studies are discussed. COMPARE analysis allowed to disclose probable modes of anticancer action for synthesized compounds, in particular showed number of high correlations with activity patterns of alkylating agents (PCC similar to 0.606-0.731). (C) 2010 Elsevier Ltd. All rights reserved.
Antimycobacterial activity of 5-arylidene aromatic derivatives of hydantoin
作者:Ewa Szymańska、Katarzyna Kieć-Kononowicz
DOI:10.1016/s0014-827x(01)01194-6
日期:2002.4
Various 5-(chlorobenzylidene)-2-isoniazido and 5-(chlorobenzylidene)-2-amino substituted derivatives of imidazoline-4-one were synthesized and evaluated in the primary assay for their antimycobacterial activity against Mycobacterium tuberculosis H37Rv. Eight of them exhibited >90% inhibition in the primary screening at 12.5 mug/ml. For these primarily selected compounds the actual MIC and IC50 values were determined. Two of the isoniazid derivatives, for which MIC less than or equal to3.13 mug/ml and SI>10, were selected for further screening and investigated for efficacy in vitro in a TB-infected macrophage model. The most promising compound, 5-(3-chlorobenzylidene)-2-(isonicotinoylhydrazino)-imidazoline-4-one, with activity in vitro comparable with rifampin (MIC=0.8 mug/ml, SI>78) was tested in vivo in the animal tuberculosis model but exhibited insignificant activity. For several compounds the primary screening of antimycobacterial activity against Mycobacterium avium (ATCC 25291) was conducted as well, but none of them demonstrated satisfactory activity. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
Bicyclic imidazole-4-one derivatives: a new class of antagonists for the orphan G protein-coupled receptors GPR18 and GPR55