FIELD: agriculture. SUBSTANCE: present invention describes new herbicidal derivatives of general formula (I):
wherein Z is oxygen atom; R1 and R2 are each independently hydrogen atom or C1-C8-alkyl, C2-C8-alkenyl, C2-C8 alkynyl, C3-C6- cycloalkyl, (C3-C6-cycloalkyl) C1-C8-alkyl, C1-C6-alkoxy, phenyl, C1-C8-alkylamino, C1-C6-dialkylamino or phenylamino group, each group being optionally substituted by one or more halogen atoms or C1-C4-alkoxy or cyano groups, or R1 and R2 are together C2-C6-alkylene, provided that only one from R1 and R2 is optionally substituted C1-C6-alkoxy, C1-C8-alkylamino, C1-C6-dilalkylamino or phenylamino group; R3, if present, is C1-C4-alkyl group; R4 is C1-C4-alkyl or phenyl, phenyl group being optionally substituted by one or more halogen atoms; R5 and R6 are each independently hydrogen atom or C1-C4-alkyl, C3-C6-cycloalkyl or phenyl, each group being optionally substituted by one or more halogen atoms, and n is 0 or 1. Present invention also describes preparation of said picolineamides, intermediate compounds prepared by synthesis of such compounds, and compositions comprising these compounds, and use thereof as herbicides for controlling undesired vegetation. EFFECT: improved properties of the herbicidal composition and more efficient control method. 8 cl, 178 ex, 12 tbl
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