abstract |
Disclosed is an optically active difluoromethanesulfonanilide derivative which can exhibit an excellent herbicidal activity at a low dose. Specifically disclosed is an optically active (R)-2'-(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl-1,1- difluoromethanesulfonanilide derivative represented by formula (I) [wherein R 1 represents a hydrogen atom, a C1-C4 alkyl group, or a (C1-C4)-alkoxy-(C1-C4)-alkyl group]. The difluoromethanesulfonanilide derivative can be produced by the optical resolution of a racemate of the derivative, i.e., an (RS)-2'-(4,6-dimethoxypyrimidin-2-yl)hydroxymethyl-1,1- difluoromethanesulfonanilide. |