27-Oxomilbemycins A3 and A4 and 27-hydroxymilbemycins A3 and A4 were identified as metabolites in soil metabolism studies of milbemycins A3 and A4. Chemical derivation methods were developed to synthesize 27-oxomilbemycins A3 and A4 and 27-hydroxymilbemycins A3 and A4 from milbemycins A3 and A4. In addition, 27-alkoxymilbemycin derivatives were also synthesized from the same precursors. Some of the synthesized compounds displayed satisfactory acaricidal activity against the organophosphorus-sensitive two-spotted spider mite (Tetranychus urticae), but did not have superior activity to corresponding milbemycins A3 and A4.
在对米尔贝霉素A3和A4进行土壤代谢研究时,27-氧代米尔贝霉素A3和A4以及27-羟基米尔贝霉素A3和A4被确定为代谢产物。研究人员开发了
化学衍生方法,从米尔贝霉素A3和A4中合成27-氧代米尔贝霉素A3和A4以及27-羟基米尔贝霉素A3和A4。此外,研究人员还从相同的前体中合成了27-烷氧基米尔贝霉素衍
生物。其中一些合成的化合物对有机
磷敏感的两斑叶螨(Tetranychus urticae)表现出令人满意的杀螨活性,但活性不如相应的米尔贝霉素A3和A4。