| 摘要 |
Microbicides Compounds of formula I and their acid addition salts are valuable microbicides and may be used in the form of compositions in plant protection for preventing and controlling an attack by microorganisms. (I) In the formula: X is oxygen or sulfur, Het is a 5- or 6-membered heterocycle which has from one to three identical or different hetero atoms selected from nitrogen, oxygen and sulfur and which is unsubstituted or mono-, di- or tri-substituted by identical or different substituents selected from halogen, cyano, nitro, C1-C4alkyl, C3-C6cycloalkyl, C1-C4alkoxy, C1-C3haloalkoxy and trifluoro-methyl, B is -CH2-CH(R2)-CH2- or -CH=C(R2)-CH2- or -CH2-C(R2)=CH-, R1 is halogen, C1-C4alkyl or C1-C4alkoxy, n is from 0 to 2, m is 0 or 1, R2 is hydrogen or C1-C4alkyl, R3 is hydrogen or C1-C3alkyl, R4 is hydrogen, hydroxy, C1-C3alkoxy or unsubstituted C1-C4alkyl or C1-C4alkyl substituted by hydroxy or by C1-C3alkoxy, and Z is oxygen, sulfur or -CH2-.
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