NATURAL-PRODUCT-BASED INSECTICIDAL AGENTS 16. SEMISYNTHESIS OF C7-OXIME SULFONATE ESTER DERIVATIVES OF OBACUNONE AS INSECTICIDAL AGENTS AGAINST MYTHIMNA SEPARATA WALKER

摘要

A series of novel C7-oxime sulfonate ester derivatives of obacunone (3a-f) were synthesized. Their insecticidal activity was also evaluated at the concentration of 1 mg/mL against the pre-third-instar larvae of oriental armyworm (Mythimna separata Walker), a typical lepidopteran pest. Especially C7-oxime p-ethylphenylsulfonate ester of obacunone (3d) exhibited more potent insecticidal activity than their precursor obacunone and toosendanin (a positive control).