TRIFLUOROMETHANESULFONAMIDE DERIVATIVE, ITS PREPARATION, AND HERBICIDE CONTAINING IT AS ACTIVE INGREDIENT

摘要

NEW MATERIAL:A trifluoromethanesulfonamide derivative shown by the formula I (R is lower alkyl; X and Y are different, and C and N). EXAMPLE:N-[3-(2-N-Methylcarbamoylpyridyl)]trifluoromethanesulfonamide. USE:A herbicide. Showing effects on various weeds which cause problems by foliar treatment and soil treatment in plowed fields, showing no phytotoxicity to main crops, which becomes problems. PREPARATION:An aminopyridinecarboxylic acid amide derivative shown by the formula II is reacted with trifluoromethanesulfonic anhydride or a trifluoromethanesulfonic acid halide in a solvent in the presence of a dehydrohalogenating agent, to give a compound shown by the formula I .