| abstract |
NEW MATERIAL:A compound shown by formula I {R1 is alkyl or alkenyl; X is (halo)alkyl, alkylthio or NO 2 ; Y is H, alkyl, alkoxy or halogen; Z is H, alkyl or halogen; R2 is alkyl; n is 0W2; Q is group shown by formula II or group shown by formula III [B1 is CO, C(O)O, OC(O), etc.; B3 is S, O, NR17, etc.; R3 is H, alkyl, phenyl, etc.; R4WR7 and R17 are H, alkyl, alkenyl, etc.; m 1 and m 3 Wm 5 are 0W5]}. n EXAMPLE: 1-Ethyl-4-(2-methyl-4-methylsulfonyl)-acetonyloxypyrazole. n USE: A herbicide. n PREPARATION: A benzoic acid derivative shown by formula IV is reacted with a 1-substituted-5-hydroxypyrazole shown by formula V in the presence of both N,N'-dicyclohexylcarbodiimide and a base to give a compound shown by formula VI, which is reacted with a compound shown by the formula L-Q (L is halogen, methanesulfonyloxy, etc.) to give a compound shown by formula I. n COPYRIGHT: (C)1988,JPO&Japio |