METHOD FOR PREPARING HERBICIDE DERIVATIVES AND INTERMEDIATE COMPOUND Russian patent published in 2005 - IPC

FIELD: organic chemistry, chemical technology, herbicides.

SUBSTANCE: invention describes a method for preparing compounds of the formula (I):

wherein each R₁, R₂, R₃ means independently of one another (C-C₆)-alkyl; R can represent also pyridyl; R₄ and R₅ in common with nitrogen atoms to which they are joined form unsaturated 5-8-membered heterocyclic ring that can be broken by oxygen atom; G means hydrogen atom. Method involves interaction of compound of the formula (II):

wherein R₁, R₂ and R₃ have above given values; R₆ is a group RR₉N-; R₇ is a group R₁₀R₁₁N-; each among R₈, R, R₁₀ and R₁₁ means independently of one another hydrogen atom or (C₁-C₆)-alkyl in inert organic solvent being optionally with the presence of a base with compound of the formula (IV) ,

(IVa)

or (IVb) ,

wherein R₄ and R have above given values; H x Hal means hydrogen halide. The prepared compound of the formula (I) wherein G represents ammonium cation is converted to the corresponding compound of the formula (I) by treatment with Brensted's acid wherein G represents hydrogen atom. Also, invention describes compound of the formula (II) wherein R₁, R₂, R₃, R₆ and R₇ have above indicated values.

EFFECT: improved preparing method.

9 cl, 12 ex