HERBICIDAL DIACYL DERIVATIVES OF PROPYLENE DIAMINE

摘要

Novel herbicidal compounds are provided having formula (I), wherein one of R<1a> and R<1b> is a methyl, hydroxymethyl or monohalomethyl group and the other is hydrogen; R<2> is a group R<3>-(X<1>)m- where X<1> is a methylene, oxy or thio linkage, m is 0 or 1, and R<3> is a substituted phenyl group of formula (A), where RA<2> is a hydrogen, halogen or methyl group and RA<3> is a halogen or halomethyl group; and R<4> is an alpha -halo- or alpha , alpha -dihalo-(C1-3)alkyl group or a group having the formula -(X<2>)n-R<5> where X2 is a methylene, oxy or thio linkage, n is 0 or 1, and R5 is an optionally substituted five-member or six-member aromatic or heterocyclic ring.