PYRIDAZINE COMPOUND AND HERBICIDE Russian patent published in 2024 - IPC C07D409/04 C07D409/14 A01N43/58 A01P13/00 

FIELD: agriculture.

SUBSTANCE: invention relates to a novel pyridazine compound of formula (I). In formula (I), R¹ is a substituted or unsubstituted C1-C6 alkyl group, an unsubstituted C2-C6 alkenyl group or an unsubstituted C3-C6 cycloalkyl group, where substitute in C1-C6 alkyl group is halogen or C1-C6 alkoxy group, R² represents a hydrogen atom, a substituted or unsubstituted C1-C6 alkyl group, a group R^a-CO-, a group R^a-O-CO-, a group R^a-SO₂-, a group R-CO-O-CR^b₂- or group R^aO-CO-O-CR^b₂-, where the substituent in the C1-C6 alkyl group is a C1-C6 alkoxy group, each R^a independently represents an unsubstituted C1-C6 alkyl group, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted pyrazolyl group, where the substituent on the phenyl group or pyrazolyl group is a C1-C6 alkyl group, each R^b independently represents a hydrogen atom or an unsubstituted C1-C6 alkyl group, R³ is a hydrogen atom, an unsubstituted C1-C6 alkyl group or an unsubstituted C3-C6 cycloalkyl group, R⁴ is a halogen, a substituted or unsubstituted C1-C6 alkyl group, a substituted or unsubstituted C1-C6 alkoxy group or a cyano group, where the substitute in the C1-C6 alkyl group or C1-C6 alkoxy group is halogen, R⁵ is a hydrogen atom or a halogen and R⁶ is a hydrogen atom, A is an unsubstituted C1-C4 alkylene group, X¹ is a sulphonyl group, X² is a sulphenyl group or a sulphonyl group, m is 0 or 1, n is 0 or 1, and the sum of m and n is 1 or 2, and when A is an unsubstituted methylene group, the sum of m and n is 2. Also disclosed is a herbicide containing at least one representative selected from the group consisting of a compound of formula (I) and a salt thereof, as an active substance, and a method of controlling monocotyledonous and/or dicotyledonous weeds among cultivated plants.

EFFECT: disclosed pyridazine compound can be used as an active substance in herbicides, has reliable efficiency in weed control even in low dosage, reduced phytotoxicity in relation to cultivated plants and is safe for environment.

3 cl, 10 tbl, 9 ex