DIFLUOROMETHANESULFONYLANILIDE DERIVATIVE, ITS PRODUCTION AND HERBICIDE CONTAINING THE SAME AS ACTIVE INGREDIENT

摘要

PROBLEM TO BE SOLVED: To produce a new compound useful as a herbicide effective in remov ing weeds within a wide range including hardly controllable weeds growing in a paddy field and safe for mammals. SOLUTION: This compound is represented by formula I (R1 is H, an alkyl or an alkoxyalkyl), e.g. 2-[(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl]-N- difluoromethanesulfonylanilide. Furthermore, the above compound is produced by reacting a 2-substituted aniline derivative represented by formula II with a difluoromethanesulfonyl halide or difluoromethanesulfonic acid anhydride in the presence of a base such as pyridine in a solvent such as tetrahydrofuran at a temperature within the range of about -70 to +250 deg.C for about 5 min to 7 days and then, as desired, converting the resultant compound into its salt.