Design and discovery of tyrosinase inhibitors based on a coumarin scaffold
作者:M. J. Matos、C. Varela、S. Vilar、G. Hripcsak、F. Borges、L. Santana、E. Uriarte、A. Fais、A. Di Petrillo、F. Pintus、B. Era
DOI:10.1039/c5ra14465e
日期:——
A novel series of 3-aryl and 3-heteroarylcoumarins displaying tyrosinase inhibitory activity.
一部包含对酪氨酸酶抑制活性的3-芳基和3-杂环基香豆素的小说系列。
Inhibition of horseradish peroxidase catalytic activity by new 3-phenylcoumarin derivatives: Synthesis and structure–activity relationships
作者:Luciana M. Kabeya、Anderson A. de Marchi、Alexandre Kanashiro、Norberto P. Lopes、Carlos H.T.P. da Silva、Mônica T. Pupo、Yara M. Lucisano-Valim
DOI:10.1016/j.bmc.2006.10.068
日期:2007.2.1
which also show this substituent in the B-ring. The presence of 6,2'-dihydroxy group or 6,7,3',4'-tetraacetoxy group in the 3-phenylcoumarin structure also contributed to a significant inhibitory effect on the HRP activity. The catechol-containing 3-phenylcoumarinderivatives also showed free radical scavenger activity. Molecular modeling studies by docking suggested that interactions between the heme
In the present work we synthesized a selected series of hydroxylated 3-phenylcoumarins 5–8, with the aim of evaluating in detail their antioxidant properties. From an in depth study of the antioxidant capacity data (ORAC-FL, ESR, CV and ROS inhibition) it was concluded that these derivatives are very good antioxidants, with very interesting profiles in all the performed assays. The study of the effect of the number and position of the hydroxyl groups on the antioxidant activity was the principal aim of this study. In particular, 7-hydroxy-3-(3'-hydroxy)phenylcoumarin (8) proved to be the most active and effective antioxidant of the selected series in four of the performed assays (ORAC-FL = 11.8, capacity of scavenging hydroxyl radicals = 54%, Trolox index = 2.33 and AI30 index = 0.18). However, the presence of two hydroxyl groups on this molecule did not increase greatly the activity profile. Theoretical evaluation of ADME properties of all the derivatives was also carried out. All the compounds can act as potential candidates for preventing or minimizing the free radical overproduction in oxidative-stress related diseases. These preliminary findings encourage us to perform a future structural optimization of this family of compounds.