Novel 4-Methylumbelliferone Amide Derivatives: Synthesis Characterization and Pesticidal Activities

摘要

A series of novel 4-methylumbelliferone amide derivatives were designed, synthesized and characterized by ¹H NMR, ¹³C NMR and HR-ESI-MS. The structures of compounds >4bd and >4be (compounds named by authors) were further confirmed by X-ray single crystal diffraction. The acaricidal, herbicidal and antifungal activities of the synthesized compounds were assayed for their potential use as pesticide. The results indicated that compounds >4bi, >4ac and >4bd were strong acaricidals against Tetranychus cinnabarinus, with 72h corrected mortalities of greater than 80% at 1000 mg/L. Meanwhile, compounds >4bh and >4bf exhibit the strongest inhibition against the taproot development of Digitaria sanguinalis and Chenopodium glaucum, and were even more potent than the commercial herbicide Acetochlor against D. sanguinalis. In addition, compounds >4bk, >4bh and >4bp showed the highest antifungal activity against the mycelium growth of Valsa mali, which makes them more effective than commercial fungicide Carbendazim.