N-(PHENYLSULFONYL) PICOLINAMIDE DERIVATIVES, PROCESS FOR PRODUCING THE SAME, AND HERBICIDE

摘要

A herbicide comprising as the active ingredient an N-(phenylsulfonyl)picolinamide derivative represented by the following general formula. This ingredient is synthesized by condensing a substituted picolinic acid with a substituted benzenesulfonamide or reacting a substituted picolinic phenyl ester with a substituted benzenesulfonamide in the presence of a basic compound: <CHEM> wherein X represents halogen atom, C1-C4 alkyl group, C1-C4 haloalkyl group, C1-C4 alkoxy group, C1-C4 haloalkoxy group, (C1-C4 alkoxy)carbonyl group, (di-C1-C4 alkylamino)sulfonyl group, N-(C1-C4 alkyl)-N-(C1-C4 alkoxy)amino­sulfonyl group, (C1-C4 alkylamino)sulfonyl group, C1-C4 alkylthio group, C1-C4 alkylsulfinyl group, C1-C4 alkylsulfonyl group or nitro group, n is an integer of 0 - 5, Y represents halogen atom, C1-C4 alkyl group, C1-C4 haloalkyl group, C1-C4 alkoxy group, C1-C4 haloalkoxy group, C1-C4 alkylthio group, C1-C4 haloalkylthio group, amino group, C1-C4 alkylamino group, di-C1-C4 alkylamino group, (C1-C4 alkoxy) C1-C4 alkyl group, (C1-C4 alkylthio) C1-C4 alkyl group or nitro group, m is an integer of 0 - 4.