| abstract |
REFERS TO COMPOUNDS DERIVED FROM PIPERAZINE OF FORMULA (I) WHERE R1 IS HALOGEN, CN, NITRO, PHENYL, AMONG OTHERS; R2 IS H, HALOGEN, CN, NITRO, ALKYL (C1-C4), AMONG OTHERS; R3 IS H O HALOGEN; R4 IS ALKYL (C1-C4), ALKENYL (C3-C4) OR ALKYNYL (C3-C4); R5 IS H, ALKYL (C1-C4), ALKENYL (C3-C4), AMONG OTHERS; R6 IS ALKYL (C1-C4), HYDROXYALKYL (C1-C4) OR HALOALKYL (C1-C4); R7 AND R8 ARE EACH H, OH, ALCOXY (C1-C4), HALOALCOXY (C1-C4), AMONG OTHERS; R9 AND R10 ARE EACH H, HALOGEN, CN, NO2, ALKYL (C1-C4), AMONG OTHERS. THE PREFERRED COMPOUNDS ARE: 2- [5-BENZYL-1,4,5-TRIMETHYL-3,6-DIOXOPIPERAZIN-2-ILIDENMETIL] -BENZONITRILE, 2- [5-BENZYL-1,4,5-TRIMETIL-3,6 -DIOXOPIPERAZIN-2-ILIDENMETIL] -3-FLUORBENZONITRILE, 2- [5-BENZYL-1,4,5-TRIMETIL-3,6-DIOXOPIPERAZIN-2-ILIDENMETIL] -3-METOXIBENZONITRILE, AMONG OTHERS. IT ALSO REFERS TO A PREPARATION PROCEDURE AND A COMPOSITION. SUCH COMPOUNDS ARE HERBICIDAL AGENTS |