PYRAZOLINE DERIVATIVES

摘要

Pyrazoline derivatives have the formula (I) wherein R1 represents a hydrogen atom, a lower alkyl group, phenyl group, a halogen-substituted phcnyl group, a cyano alkyl group or a lower alkoxy alkyl group; R2 and R3 respectively represent a hydrogen atom, a lower alkyl group, phenyl group or a halogen-substituted phenyl group; R4 represents a hydrogen atom or a lower alkyl group; X represents a hydrogen atom or a halogen atom; W represents an oxygen or sulfur atom; Y and Z respectively represent a hydrogen atom, a haloqen atom, a lower alkyl group, a lower alkoxy group, nitro group, trifluoromethyl group, a lower alkylthio group, an acyl group, nitrile group, a lower alkyl sufonyl group, a lower alkoxycarbonyl group, -A-R5 or Y and Z form and A represents -O-, -S-, -SO- or -SO2- and R5 represents a halogen-substitu-ted lower alkyl group and are useful as insecticedes.