Synthesis of Various Kinds of Isoflavones, Isoflavanes, and Biphenyl-Ketones and Their 1,1-Diphenyl-2-picrylhydrazyl Radical-Scavenging Activities
作者:Hideyuki Goto、Yoshiyasu Terao、Shuji Akai
DOI:10.1248/cpb.57.346
日期:——
Forty-eight kinds of isoflavones (8), thirty-one isoflavanes (9), and forty-seven biphenyl-ketones (10, 10′) were synthesized from eleven kinds of substituted phenols (11) and six phenylacetic acids (12). Among them, seventy-five compounds are new. The radical scavenging activities of these compounds were evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) at pH 6.0. We found that thirty-nine out of forty-three compounds having a catechol moiety on either the A- or the B-ring exhibited a high activity (ED50=12—54 μM) similar to that of catechin. In these cases, the remaining part of their structure seemed to have little effect on their activity. Many 6- or 8-hydroxyisoflavanes (9E—I) and their biphenyl-ketone derivatives (10E—H) also showed a high activity (ED50=<50 μM), while all of their corresponding isoflavones (8E—I) were not active at all. The 7-hydroxyisoflavanes having either an additional hydroxyl group at the C5-position (9D) or a methoxy group at the C6-position (9J) presented a high activity (ED50=26—32 μM). This study suggests that natural isoflavones have the possibilities of exhibiting antioxidant activities through the hydroxylation at the C6-, C8-, or C3′-position or the formation of the isoflavanes (9) and/or the biphenyl-ketone derivatives (10′) by metabolism or biotransformation.
[EN] COMPOUNDS AND PHARMACEUTICAL COMPOSITIONS FOR THE TREATMENT OF NEGATIVE-SENSE SSRNA VIRUS INFECTIONS<br/>[FR] COMPOSÉS ET COMPOSITIONS PHARMACEUTIQUES POUR LE TRAITEMENT DE D’INFECTIONS VIRALES À ARN SIMPLE BRIN, SENS NÉGATIF
申请人:SAVIRA PHARMACEUTICALS GMBH
公开号:WO2011000566A2
公开(公告)日:2011-01-06
The present invention relates to novel compounds and pharmaceutical compositions and the use thereof for the manufacture of a medicament for treating, ameliorating, or preventing disease conditions caused by a viral infection with negative-sense ssRNA viruses.
Synthesis and biological evaluation of novel chromonyl enaminones as α-glucosidase inhibitors
作者:Aarón Mendieta-Moctezuma、Catalina Rugerio-Escalona、Nemesio Villa-Ruano、Rsuini U. Gutierrez、Fabiola E. Jiménez-Montejo、M. Jonathan Fragoso-Vázquez、José Correa-Basurto、María C. Cruz-López、Francisco Delgado、Joaquín Tamariz
DOI:10.1007/s00044-019-02320-w
日期:2019.6
increased the inhibition of α-glucosidase. Compounds 2a–e exhibited a slight antioxidant effect, and compounds 3a–e a moderate antifungal activity against C. albicans (IC50 70.5–83.1 µg/mL). Docking studies revealed that compounds 2 interact with the α-glucosidase residues of the binding pocket. Therefore, these chromone derivatives may be considered as potential α-glucosidaseinhibitors, as well as antifungal