10.3762/bjoc.14.207
The study focuses on the semi-synthesis and insecticidal activity of spinetoram J and its D-forosamine replacement analogues. Spinetoram, derived from fermentation, is a broad-spectrum insecticide that is environmentally friendly and non-toxic to animals and humans. The researchers improved the semi-synthesis process of spinetoram J by using 3-O-ethyl-2,4-di-O-methylrhamnose as both a reaction substrate and a protecting group, which simplified the synthesis steps and reduced costs. They also synthesized a range of D-forosamine replacement analogues and evaluated their insecticidal activities against Plutella xylostella larvae. Although the analogues did not match the potency of spinetoram, some showed only 20–40 times lower activity, with one analogue being nearly as active as spinosad. The findings suggest the potential for developing new insecticides by modifying sugar components in natural products and highlight the importance of the electrical properties of substituents in insecticidal activity.