Synthesis and antimalarial evaluation of a screening library based on a tetrahydroanthraquinone natural product scaffold.

Abstract:

:As part of a research program aimed at discovering new antimalarial leads from Australian macrofungi a unique fungi-derived prefractionated library was screened against a chloroquine-sensitive Plasmodium falciparum line (3D7) using a radiometric growth inhibition assay. A library fraction derived from a Cortinarius species displayed promising antimalarial activity. UV-guided fractionation on the CH(2)Cl(2)/MeOH extract from this fungus resulted in the isolation of four known compounds: (1S,3R)-austrocortirubin (1), (1S,3S)-austrocortirubin (2), 1-deoxyaustrocortirubin (3), and austrocortinin (4). Compound 2 was used as a natural product scaffold in the parallel solution-phase synthesis of a small library of N-substituted tetrahydroanthraquinones (5-15). All compounds (1-15) were tested in vitro against P. falciparum 3D7 parasites and (1S,3S)-austrocortirubin (2), the major fungal constituent, was shown to be the most active compound with an IC(50) of 1.9 μM. This compound displayed moderate cytotoxicity against neonatal foreskin fibroblast (NFF) cells with an IC(50) of 15.6 μM.

journal_name

Bioorg Med Chem

authors

Choomuenwai V,Andrews KT,Davis RA

doi

10.1016/j.bmc.2012.09.052

subject

Has Abstract

pub_date

2012-12-15 00:00:00

pages

7167-74

issue

24

eissn

0968-0896

issn

1464-3391

pii

S0968-0896(12)00773-0

journal_volume

20

pub_type

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