Synthesis of 4-(Diethylamino)salicylaldehyde Derivatives and Research on Their Antifungal Mechanism against Rhizoctonia solani
To enhance the antifungal activity of 4-(diethylamino)salicylaldehyde (DSA), 20 salicylaldehyde Schiff base compounds (L1–L20), including nine novel derivatives, were synthesized and characterized by MS, 1H NMR, and 13C NMR. In vitro assays identified compound L5 as the most active agent, with an EC50 of 10.797 μg/mL...