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ID: ALA1144007
Journal: Bioorg Med Chem
Title: Activity of Mannich bases of 7-hydroxycoumarin against Flaviviridae.
Authors: Mazzei M, Nieddu E, Miele M, Balbi A, Ferrone M, Fermeglia M, Mazzei MT, Pricl S, La Colla P, Marongiu F, Ibba C, Loddo R.
Abstract: Some Mannich bases of 7-hydroxycoumarin (2) and their simple derivatives (3 and 4) were prepared and tested against viruses containing single-stranded, positive-sense RNA genomes (ssRNA(+)). This study was directed toward Flaviviridae and, in particular, HCV surrogate viruses (BVDV, YFV). The 7-hydroxy derivatives 2 were generally devoid of activity, but when position 7 was propylated, the resulting 7-propyloxy derivatives 3 were in some cases endowed with an interesting activity against BVDV. The formation of 7-benzoyl derivatives 4 gave compounds generally lacking in activity against Flaviviridae, whereas the appearance of activity against RSV has been observed. Also some unsymmetrical methylene derivatives 5-7 (namely coumarins bridged to chromones or indoles) were found moderately active in antiviral tests. Derivatives 3 were submitted to a molecular modeling study using DNA polymerase of HCV as a target. The good correlation between calculated molecular modeling IC(50) and experimental EC(50) indicates that DNA polymerase is potentially involved in the inhibition of surrogate HCV viruses.
CiteXplore: 18054491