| 摘要 |
The present invention relates to novel pyridazine derivatives of formula (I) as active ingredients which have microbiocidal activity, in particular f ungicidal activity: wherein R1 is hydrogen, C1-C6alkyl, C1-C8haloalkyl or C3 -C6cycloalkyl; R2 is cycloalkyl, cycloalkylalkyl, halocycloalkyl, cycloalkox y, halocycloalkoxy, cycloalkylalkoxy, halocycloalkylalkoxy, alkoxyalkyl, cyc loalkoxyalkoxyalkyl, haloalkoxyalkyl, trialkylsilyl, alkylthioalkyl, haloalk ylthioalkyl, cycloalkylthio, halocycloalkylthio, cycloalkylalkylthio, halocy cloalkylalkylthio, alkylsulfinylalkyl, alkylsulfonylalkyl, alkylsulfinyl, ha loalkylsulfinyl, alkylsulfonyl, haloalkylsulfonyl, C2-C6alkenyl, C2-C6alkyny l, optionally substituted arylsulfonyl, optionally substituted aryloxy, opti onally substituted heteroaryloxy, optionally substituted arylthio, optionall y substituted heteroarylthio; or R2 together with an adjacent carbon atom fo rms an optionally substituted fused ring; R3 is an optionally substituted ar yl; R4 is hydrogen, halogen, C1-C6alkyl, C1-C6haloalkyl, C1-C8alkoxy, C1-C6h aloalkoxy, hydroxy or cyano; and n is a whole number from 1 to 4; or an agro chemically usable salt form thereof.
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