4-ETHYL-3-(SUBSTITUTED PHENYL)-1-(3-TRIFLUOROMETHYLPHENYL)-2-PYRROLIDINONE DERIVATIVE, ITS PRODUCTION AND HERBICIDE CONTAINING THE SAME DERIVATIVE AS ACTIVE INGREDIENT

摘要

NEW MATERIAL:A compound expressed by formula I (R is H, F or Cl; X is H, F, Cl, Br, CF3, CH3, CN or NO2; (n) is 1 or 2). EXAMPLE:4-ethyl-3-(4-fluorophenyl)-1-(3-trifluoromethylphenyl)-2-pyrro lidinone. USE:Used as selective herbicide having effect harmful weed with a low dose without giving damage to useful crop in paddy field or dry field farming. PREPARATION:For instance, a compound expressed by formula II (Y is halogen) is cyclized by trialkyltin hydride in an aromatic solvent to afford the compound expressed by formula I. The compound expressed by formula II is obtained by reaction of amine expressed by formula III and a carboxylic acid derivative expressed by formula IV (Z is halogen).