| 摘要 |
<p>Disclosed are 2-cyano-1,3-diones derivatives of formula (I) wherein: R represents an optionally substituted alkyl or an optionally substituted cycloalkyl group; R1 represents halogen, hydrogen, nitro, -O(CH2)mOR5, cyano-group, -SR5, R5, OR5, CO2R5 or alkyl substituted by OR5; R2 and R3 represent a halogen, hydrogen, R5, alkyl substituted by -OR5, -O(CH2)mOR5, nitro, cyano, -OR5 or -CO2R5; R4 and R5 represent an optionally substituted alkyl group; n represents zero, 1 or 2 and m represents an integer from 1 to 3; and agriculturally acceptable salts of enolic tautomeric forms thereof, a method of their preparation and herbicidal compositions which said derivatives use as their active substances.</p> |
