| 摘要 |
PURPOSE:To obtain a novel benzylhydrazone derivative capable of exhibiting excellent control effect on blast of rice, downy mildew of cucumber, powdery mildew of barley, etc., at a low dose. CONSTITUTION:A compound of formula I [X is formula IV, formula V (R<5> is alkyl); Y is alkoxy, alkylthio, amino, etc.; Z is halogen or (halo)alkyl; (m) is 0-4; R<1> is H or (halo)alkyl; R<2> is formyl, alkylcarbonyl, alkylsulfonyl, aminocarbonyl, phenylcarbonyl, phenoxycarbonyl, etc.; R<3> and R<4> are H, CN, alkyl, cycloalkyl, alkoxy, alkylthio, alkylsulfynyl, alkylsulfonyl, phenyl, morpholino, or R<3> and R<4> together form alkylene or alkenylene], e.g. methyl 2-[2-[l-acetyl-2-[1-(3-chlorophenyl)ethylidene]hydrozinomethyl]phenyl]-2- methoxypropenoate. The compound is obtained by reacting a compound of formula II with a compound of formula III in the presence of a base or silver compound in an inert solvent. |
