Oxindole derivatives 3-25 have been synthesized from commercially available oxindole by refluxing with different
aromatic aldehydes in good yields. Their in vitro antiglycation potential has been evaluated. They showed a varying
degree of antiglycation activity with IC50 values ranging between 150.4 - 856.7 µM. 3-[(3-Chlorophenyl)methylidene]-
1,3-dihydro-2H-indol-2-one (IC50 = 150.4 ± 2.5 µM) is the most active compound among the series, better than the standard
rutin with an IC50 value 294.5 ± 1.50 µM. The structures of the compounds were elucidated by 1H-NMR and mass
spectroscopy and elemental analysis. A limited structure-activity relationship has been developed.
Natural α-methylenelactam analogues: Design, synthesis and evaluation of α-alkenyl-γ and δ-lactams as potential antifungal agents against Colletotrichum orbiculare
In our continued efforts to improve the potential utility of the alpha-methylene-gamma-lactone scaffold, 62 new and 59 known natural alpha-methylenelactam analogues including alpha-methylene-gamma- lactams, alpha-arylidene- gamma and delta-lactams, and 3-arylideneindolin-2-ones were synthesized as the bioisosteric analogues of the amethylenelactone scaffold. The results of antifungal and cytotoxic activity indicated that among these derivatives compound (E)-1-(2, 6-dichlorobenzyl)-3-(2-fluorobenzylidene) pyrrolidin-2-one (Py51) possessed good selectivity with the highest antifungal activity against Colletotrichum orbiculare with IC50 - 10.4 mu M but less cytotoxic activity with IC50 - 141.2 mu M (against HepG2 cell line) and 161.2 mu M ( against human hepatic L02 cell line). Ultrastructural change studies performed by transmission electron microscope showed that Py51 could cause important cell morphological changes in C. orbiculare, such as plasma membrane detached from cell wall, cell wall thickening, mitochondria disruption, a dramatic increase in vacuolation, and eventually a complete loss in the integrity of organelles. Significantly, mitochondria appeared one of the primary targets, as confirmed by their remarkably aberrant morphological changes. Analysis of structureeactivity relationships revealed that incorporation of the aryl group into the alpha-exo methylene and the N-benzyl substitution increased the activity. Meanwhile, the alpha-arylidene-gamma-lactams have superiority in selectivity over the 3-arylideneindolin-2-ones. Based on the results, the N- benzyl substituted a-(2-fluorophenyl)-gamma-lactam was identified as the most promising natural- based scaffold for further discovering and developing improved crop- protection agents. (c) 2017 Elsevier Masson SAS. All rights reserved.
ANTI-GLYCATION PROPERTIES OF OXINDOLE DERIVATIVES
申请人:Choudhary Muhammad Iqbal
公开号:US20150038543A1
公开(公告)日:2015-02-05
This invention provides a series of new oxindole derivatives 1-21, evaluated for their antiglycation potential by using in vitro BSA-MG glycation model. These derivatives showed a varying degree of antiglycation activity with IC
50
values ranging between 150-856 μM. Compound 14 (IC
50
=150.4±2.5 μM) was found to be the most potent among all derivatives, even better than the standard inhibitor i.e. rutin (IC
50
=294.5±1.50 followed by compounds 13 and 8 with IC
50
value of 194.40±2.5 and 211.41±4.1 μM, respectively.