Talarolactones A–G, α-Pyrone Dimers with Anti-inflammatory Activities from Talaromyces adpressus, and Their Biosynthetic Pathways

Pyrone IC50 Heterologous Heterologous expression
DOI: 10.1021/acs.orglett.2c04352 Publication Date: 2023-03-09T13:24:32Z
ABSTRACT
Talarolactones A-G (1-7), seven novel α-pyrone adducts with unprecedented scaffolds, together two pairs of monomers [(±)-8 and (±)-9)] were isolated from Talaromyces adpressus. Compounds 1-7 are highly modified dimers a 4,7,7,8-tetrasubstitued 5,6,7,8-tetrahydro-2H-chromen-2-one. 5 6 possessed significant NO production inhibitory effect, IC50 values 2.3 ± 0.1 3.7 0.3 μM, respectively. Plausible biosynthetic pathways proposed supported by the results heterologous expression experiments.
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