Zanthosimuline and Related Pyranoquinolines as Antifungal Agents for Postharvest Fruit Disease Control
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
Description
The natural product zanthosimuline and its 18 analogues were easily prepared from simple starting materials and evaluated in vitro against postharvest fruit fungal pathogens. The panel included Penicillium digitatum, Botrytis cinerea, Monilinia fructicola, and Rhizopus stolonifer; all of them causing relevant economic losses worldwide. The minimum inhibitory concentrations and minimum fungicidal concentrations of each compound were determined, and the main structure–activity relationships were established. The biological activity observed was strongly increased by maintaining the prenyl side chain of zanthosimuline in an N-demethylated derivative. In addition, the compound that is the most active in the in vitro evaluation was tested in freshly harvested peaches exhibiting a promising brown rot control profile, comparable to the commercial agent carbendazim but demonstrating less toxicity against human liver cell lines.
Keywords
Infectious diseases, Antimicrobial agents, Reaction products, Solvents, Organic compounds