Nine derivatives 6-14 of carabrone (1) were synthesized and tested in vitro against Colletotrichum lagenarium Ell et Halst using the spore germination method. Among all of the derivatives, compounds 6-8 and 12 showed more potent antifungal activity than 1. Structure-activity relationships (SAR) demonstrated that the γ-lactone was necessary for the antifungal activity of 1, and the substituents on the C-4 position of 1 could significantly affect the antifungal activity.
potential utility of the natural lead compound of carabrone in agrochemistry, carabroneoxime and 36 noveloximeesterderivatives of carabronemodified at C(4) were synthesized, and evaluated for their antifungalactivities against Botrytis cinerea in vitro and in vivo. Of these 36 oximeesterderivatives, some compounds exhibited antifungalactivities in vitro or in vivo. It was found that compounds