Biologically active agent containing substituted isoxazolidines, isoxazolidines and their preparation.

摘要

Substituted isoxazolidines of the formula in which R1 represents optionally substituted alkyl, cycloalkyl, aralkyl, aryl or heteroaryl or radicals of the formula -COR4, R4 represents optionally substituted alkyl, aryl, alkoxy, alkylthio, aroxy, arylthio, amino, alkylamino, dialkylamino, arylamino, arylalkylamino, diarylamino or cycloalkylamino, or optionally substituted heterocyclic radicals which are bonded via nitrogen, R2 represents hydrogen or the radicals mentioned for R1, it being possible for R1 and R2 to be identical or different, and R3 represents optionally substituted alkyl, cycloalkyl, alkenyl, alkinyl or aryl, or saturated heterocyclic radicals, which are optionally substituted, and acid salts thereof, are pesticidally active and increase animals' utilization of feed. Intermediates therefor are also new.