Journal of Organic Chemistry. Vol.66, No.14 (2001), 4803-4808
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M. Isaka, M. Tanticharoen, Palangpon Kongsaeree, Yodhathai Thebtaranonth Structures of cordypyridones A-D, antimalarial N-hydroxy- and N-methoxy-2-pyridones from the insect pathogenic fungus Cordyceps nipponica. Journal of Organic Chemistry. Vol.66, No.14 (2001), 4803-4808. doi:10.1021/jo0100906 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/26506
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Structures of cordypyridones A-D, antimalarial N-hydroxy- and N-methoxy-2-pyridones from the insect pathogenic fungus Cordyceps nipponica
Bioassay-guided fractionation of the extracts from the insect pathogenic fungus Cordyceps nipponica BCC 1389 led to the isolation of N-hydroxy- and N-methoxy-2-pyridones, cordypyridones A-D (1-4). Structures of these compounds, including absolute configuration, were determined by spectroscopic methods, chemical conversions and single-crystal X-ray diffraction analyses. Codypyridones A and B, atropisomers of each other, exhibited potent in vitro antimalarial activity with IC50 values of 0.066 and 0.037 μ/mL, respectively, while their cytotoxicity was much weaker.
