Synthesis and Anti-Fungal/Oomycete Activity of Novel Sulfonamide Derivatives Containing Camphor Scaffold.

Twelve novel camphor sulfonamide derivatives 2a-2l were synthesized and characterized by H-NMR, C-NMR and HRMS spectra. The anti-fungal/oomycete activity bioassay showed that some of the title compounds displayed moderate to good anti-fungal/oomycete activities against B. dothidea and P. capsici. Compound 2d exhibited the best in vitro antifungal activity toward B. dothidea. The in vivo experiment revealed that compound 2d possessed considerable anti-B. dothidea effect at 200 mg/L. Mechanism study showed that compound 2d could increase the cell membrane permeability. In addition, the in vitro enzyme inhibition assay and molecular docking results indicated that compound 2d could be a potential SDH inhibitor.