(RU2692792) FIELD: chemistry.SUBSTANCE: invention refers to compounds of formula (I). In general formula (I) Ris a chlorine atom, Ris a cyano group, Ris C-Calkyl group which can be substituted with one or more halogen atoms, depending on the case, C-Calkenyl group or C-Calkynyl group, and a is equal to 4.(I).EFFECT: invention is able to effectively combat harmful weeds at the high leaf stage, as well as to an herbicidal composition based thereon, a method of controlling undesirable plants and use thereof for controlling undesirable plants.6 cl, 5 tbl, 1 ex
(RU2692792) 1. Connection submitted by the following formula (I): 2. (I) 3. Where 4. R (1) is chlorine atom, 5. R (2) is a cyanogroup, 6. R (3) represents C -C  alkyl group which may be replaced by one or more halogen atoms, as appropriate C -C  alkenyl group or C -C  alkynyl group, and 7. A is 4 8. (except compounds where R (3) is a saturated linear hydrocarbon that is not replaced by a halogen atom and compounds where R (1) is chlorine atom R (2) is a cyanogroup and R (3) is a 3-chloropropyl group). 9. 2. Connection to p.1 where R (3) represents C -C  alkyl group which may be replaced by one or more halogen atoms, as appropriate. 10. 3. Herbicide composition containing herbicylogically an effective quantity of at least one type of connection by paragraph 1 and an auxiliary substance for compositions. 11. 4. Method of control of undesirable plants, including an effective quantity of at least one type of connection per step 1 or 2 or herbicides for an undesired plant or site. 12. 5. Application of compound 1 or 2 or herbicides for p 3 to control unwanted plants. 13. 6. Application on p.5 where the connection to p.1 or 2 is used to control undesirable plants growing among useful crops.