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• W2314508299 abstract "Sclerotiorin 1, first isolated from Penicillium sclerotiorum, has weak antifungal activity and belongs to the azaphilone-type family of natural products. Several series of sclerotiorin analogues were designed and synthesized with the aim of discovering novel fungicides with improved activity. The syntheses involved two key steps, cycloisomerization and then oxidation, and used a simple and efficient Sonogashira cross-coupling reaction to construct the required functionalized precursor. With sclerotiorin as a control, the activities of the newly synthesized analogues were evaluated against seven fungal pathogens, and several promising candidates (compounds 3a1, 3d2, 3e2, 3f2 and 3k2) with greater activity and simpler structures than sclerotiorin were discovered. In addition, preliminary structure–activity relationships were studied, which revealed that not only the chlorine or bromine substituent at the 5-position of the nucleus but also the phenyl group at the 3-position and the substituent pattern on it contributed crucially to the observed antifungal activity. Analogues with a methyl substituent at the 1-position have reduced levels of activity, while those with a free hydroxyl group in place of acetoxy at the quaternary center of the bicyclic ring system retain activity." @default.
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• W2314508299 date "2012-04-25" @default.
• W2314508299 modified "2023-10-16" @default.
• W2314508299 title "Synthesis and Antifungal Activity of Novel Sclerotiorin Analogues" @default.
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• W2314508299 doi "https://doi.org/10.1021/jf300610j" @default.
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