Substituted pyridinesulfonamide compounds, herbicidal composition containing them, and method of preparing these compounds.

摘要

Substituted pyridinesulfonamide compound and salts thereof represented by the following general formula I: group, each of R1 and R2 independently represents a hydrogen atom, an alkyl group, a haloalkyl group, an alkenyl group, an alkynyl group, an alkoxy group, a haloalkoxy group, an alkoxyalkyl group, a haloalkoxyalkyl group, a cycloalkyl group, a halocycloalkyl group, an alkoxycarbonyl group, a haloalkoxycarbonyl group, a phenyl group or a halophenyl group, provided that when one of R1 and R2 represents a hydrogen atom, the other represents one of the groups excluding the hydrogen atom; R1 and R2 together with an adjacent nitrogen atom may constitute a heterocycle; Y represents, a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, a haloalkoxy group, an alkylthio group, a haloalkylthio group, an alkoxyalkyl group, a haloalkoxyalkyl group, or an group (wherein each of R3 and R4 represents a hydrogen atom or an alkyl group); n represents 0 or an integer of 1 or 2; and each of X1 and X2 independently represents a methyl group, a methoxy group or an ethoxy group. The compounds of formula I are effective as herbicides for corn fields.