DERIVATIVES OF URACIL, INTERMEDIATE SUBSTANCES, HERBICIDE COMPOSITION ABD METHOD FOR SUPPRESSING WEED GROWTH Russian patent published in 2005 - IPC

FIELD: organic chemistry, herbicides, agriculture.

SUBSTANCE: invention relates to new derivatives of uracil of the formula [I] eliciting the herbicide effect, herbicide composition based on thereof and a method for suppression of weed growth. In the formula [I] W means oxygen (O), sulfur (S) atom or imino-group; Y means oxygen atom (O) or sulfur atom (S); R¹ means (C₁-C₃)-alkyl or (C₁-C₃)-halogenalkyl; R² means (C₁-C₃)-alkyl; R⁴ means hydrogen atom (H) or methyl; R⁵ means (C₁-C₆)-alkyl, (C₁-C₆)-halogenalkyl, (C₃-C₆)-alkenyl, (C₃-C₆)-halogenalkenyl, (C₃-C₆)-alkynyl or (C₃-C₆)-halogenalkynyl; X¹ means halogen atom, cyano- or nitro-group; X² means hydrogen atom (H) or halogen atom; each among X³ and X⁴ means independently hydrogen atom (H), halogen atom, (C₁-C₆)-alkyl, (C₁-C₆)-halogenalkyl, (C₃-C₆)-alkenyl, (C₃-C₆)-halogenalkenyl, (C₃-C₆)-alkynyl, (C₃-C₆)-halogenalkynyl, (C₁-C₆)-alkoxy-(C₁-C₆)-alkyl, (C₁-C₆)-alkoxy-, (C₁-C₆)-halogenalkoxy-, (C₁-C₆)-alkoxycarbonyl-(C₁-C₆)-alkoxy- or cyano-group. Also, invention relates to new intermediate substances used for preparing compounds of the formula [I] corresponding to formulae [VII] , [XXXIV] and [XXXIII] wherein in compound of the formula [VII] W means oxygen (O), sulfur (S) atom or imino-group; Y means oxygen (O) or sulfur atom (S); in compounds of formulae [XXXIV] and [XXXIII] W means oxygen atom (O); R¹⁷ means oxygen atom (O); R⁴ means hydrogen atom (H) or methyl. Also, invention relates to methyl- or ethyl-[2-(5-amino-2-chloro-4-fluorophenoxy)phenoxy]acetate not early described in the literature.

EFFECT: valuable herbicide properties of compounds.

23 cl, 17 sch, 9 tbl, 11 ex