期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 14, 期 9, 页码 2691-2697出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ob02657a
关键词
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资金
- China Scholarship Council (CSC)
- Region Ile-de-France
- MNHN (Paris, France)
- CNRS (France)
- CNRS (interdisciplinary call Physic-Chemistry-Biology)
Two novel oxaphenalenone dimers, talaroketals A (2) and B (3), were isolated from the soil fungus Talaromyces stipitatus. Their structures and absolute configurations were determined on the basis of spectroscopic analyses, X-ray diffraction experiments and electronic circular dichroism. Compound (2) features a rare benzannulated 5,6-spiroketal ring system within the dimeric bis(oxaphenalenone) skeleton while the parent compound (3) harbors a fused bicyclic furano-pyran moiety. These two compounds may biogenetically result from the reaction of duclauxin with a dihydrofuran derivative of botryodiplodin. Additionally, talaroketals A (2) and B (3) display modest antimicrobial activity against Staphylococcus aureus.
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