Antitrypanosomal and antioxidant properties of 4-hydroxycoumarins derivatives
摘要:
In the present communication we prepared a series of six 4-hydroxycoumarin derivatives, isosters of quercetin, recognized as an antioxidant natural compound, with the aim of evaluating the antitrypanosomal activity against Trypanosoma cruzi, the parasite responsible for Chagas disease, and the antioxidant properties. We have used the 4-hydroxycoumarin moiety (compound 1) as the molecular template for the synthesis of compounds 2-7. These derivates have shown moderate trypanocidal activity. However they have been proved to be good antioxidants. In particular compound 7 is the most active antioxidant and it is, therefore, a potential candidate for a successful employment in conditions characterized by free radicals overproduction. (C) 2012 Elsevier Ltd. All rights reserved.
3-Aryl-4-hydroxycoumarins have been obtained in satisfactory yields and selectivity through a Rh(II)-mediated arylation of diazocoumarin. The utility of this approach is demonstrated by synthesis of the natural product derrusnin.
The chemistry of pentavalent organobismuth reagents
作者:Derek H.R. Barton、Dervilla M.X. Donnelly、Jean-Pierre Finet、Paul H. Stenson
DOI:10.1016/s0040-4020(01)89826-4
日期:——
The arylation of chroman-4-one and 4-hydroxycoumarin derivatives by pentavalent arylbismuth reagents has been carried out. Chroman-4-one gives the 3-diphenyl derivative, whereas 3-formyl and 3-oxalyl derivatives are phenylated to isoflavanones in moderate to high yields. Arylation of 4-hydroxycoumarins by various Bi(V) reagents gives rise to functionally substituted 3-aryl-4-hydroxycoumarins in high
Barton, Derek H. R.; Donnelly, Dervilla M. X.; Finet, Jean-Pierre, Journal of the Chemical Society. Perkin transactions I, 1992, p. 1365 - 1376
作者:Barton, Derek H. R.、Donnelly, Dervilla M. X.、Finet, Jean-Pierre、Guiry, Patrick J.
DOI:——
日期:——
Antitrypanosomal and antioxidant properties of 4-hydroxycoumarins derivatives
作者:Fernanda Pérez-Cruz、Silvia Serra、Giovanna Delogu、Michel Lapier、Juan Diego Maya、Claudio Olea-Azar、Lourdes Santana、Eugenio Uriarte
DOI:10.1016/j.bmcl.2012.07.013
日期:2012.9
In the present communication we prepared a series of six 4-hydroxycoumarin derivatives, isosters of quercetin, recognized as an antioxidant natural compound, with the aim of evaluating the antitrypanosomal activity against Trypanosoma cruzi, the parasite responsible for Chagas disease, and the antioxidant properties. We have used the 4-hydroxycoumarin moiety (compound 1) as the molecular template for the synthesis of compounds 2-7. These derivates have shown moderate trypanocidal activity. However they have been proved to be good antioxidants. In particular compound 7 is the most active antioxidant and it is, therefore, a potential candidate for a successful employment in conditions characterized by free radicals overproduction. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of Coumestan Derivatives via FeCl<sub>3</sub>-Mediated Oxidative Ring Closure of 4-Hydroxy Coumarins
A concise and efficient approach to the syntheses of coumestan analogues has been developed. The underpinning strategy involves a FeCl3-mediated direct intramolecular oxidative annellation of 4-hydroxy-3-phenyl-2H-chromen-2-one derivatives. Utilizing this synthetic protocol, a variety of coumestan derivatives were conveniently obtained from readily available reagents.