Synthesis, anti-oomycete and anti-fungal activities of novel paeonol ester derivatives containing a schiff base.

To discover biorational natural product-based pesticides, a series of paeonol ester derivatives containing a Schiff base (, , , and ) were prepared, and their structures were well characterised by H NMR and HRMS. Furthermore, bioactivities of these compounds as anti-oomycete and anti-fungal agents against two serious agricultural diseases, and we assessed. Amongst evaluated compounds, 1) Compounds and displayed good anti-oomycete against , with EC values of 116.

Synthesis, Anti-Oomycete and Anti-Fungal Activities of Anhydride Derivatives of Oleanolic Acid.

Oleanolic acid is a pentacyclic triterpenoid extracted and isolated from the fruit of plants in the Ligustrum lucidum Ait. in the family Oleaceae. To discover biorational natural product-based pesticides, a series of oleanolic acid derivatives containing anhydride active skeletons were prepared by ingeniously introducing an active acyloxy group at its C-28 carboxyl position, and their structures were well characterized by H-NMR, C NMR, HRMS, and m.