METHOD OF INHIBITION OF WEED GROWTH, HETEROCYCLE-SUBSTITUTED PYRIDINES, METHODS OF THEIR SYNTHESIS AND HERBICIDE COMPOSITION Russian patent published in 1999 - IPC

FIELD: organic chemistry, herbicides. SUBSTANCE: invention describes a method of inhibition of weed growth in the damage location by treatment the latter with 2,6-substituted pyridine. Invention relates to the use of the compound of the formula (I) as 2,6-substituted pyridine where X means oxygen atom; A means pyridyl or pyrazolyl group optionally substituted with halogen atom, C₁-C₆-alkyl or halogen-C₁-C₆-alkyl; B means 5- or 6-membered cyclic hydrocarbon, phenyl, phenyl-C₁-C₂-alkyl group optionally substituted with halogen atoms, C₁-C₆-alkyl or halogen-C₁-C₆-alkyl or B means one of the value indicated for A; R means halogen atom or C₁-C₆-alkyl; m = 0 or 1. Invention describes new pyridines substituted with heterocycles, methods of their synthesis and herbicide composition based on compounds of the formula (I). EFFECT: enhanced herbicide activity of new compounds. 15 cl, 5 tbl, 100 ex