Benzoxepan-2-one and its 6 methoxy and dimethoxy derivatives where obtained in the reaction of Baeyer-Villiger oxidation of 1-tetralone and its methoxy and dimethoxy derivatives with m-chloroperbenzoic acid. Thre ε-lactones were affected further electophilic hydroxylation to the resp. hydroxy lactones. The starting ketones and lactones were tested for antifeedant activity against insect storage pests: adults of the grain weevil, larvae of the khapra beetle as well as adults and larvae of the confused flour beetle.
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