| abstract |
NEW MATERIAL:The (2H)-pyridazinone derivative of formula I [R is alkyl; R 1 and R 2 are H or alkyl; R 3 is halogen, alkyl, cycloalkyl, alkoxy, haloalkyl, haloalkoxy, cyano, nitro, group of formula II (X is halogen, alkyl, cycloalkyl, alkoxy, etc.; m is 1W5) or group of formula III; n is 0 or 1W5; R 4 is H or halogen]. n EXAMPLE: 2-t-Butyl-4-chloro-5-(2-methylbenzylthio)-3(2H)-pyridazinone. n USE: An insecticidal, miticidal and fungicidal agent. The characteristic feature of the compound is the presence of alkyl group at the 2-position and the benzylthio group at the 5-position of the pyridazinone ring. n PREPARATION: The compound of formula I can be prepared by reacting the compound of formula IV with the compound of formula V (hal is halogen) in the presence of a hydrogen halide absorbent. n COPYRIGHT: (C)1985,JPO&Japio |