Novel herbicidally active substituted phenylsulfonyl guanidines and intermediates thereof

Abstract

Herbicidally active novel substituted phenylsulfonyl guanidines of the formula ##STR1## in which R.sup.1 is a phenyl or phenoxy group, each ofR.sup.2 and R.sup.3 is a lower alkyl or lower alkoxy group, andR.sup.4 is a hydrogen atom, a lower alkyl group or a lower alkoxy group,and novel intermediates therefor.

Description

Claims

1. A substituted phenylsulfonyl guanidine of the formula ##STR37## in which R.sup.1 is a phenyl or phenoxy group, each of

R.sup.2 and R.sup.3 is a lower alkyl or lower alkoxy group, and

R.sup.4 is a hydrogen atom, a lower alkyl group or a lower alkoxy group.

2. A compound according to claim 1, wherein such compound is N-(2-biphenylylsulfonyl) N'-(4,6-dimethoxy-1,3,5-triazin-2-yl) N"-(methoxy)guanidine of the formula ##STR38##

3. A compound according to claim 1, wherein such compound is N-(2-biphenylylsulfonyl) N'-(4-methoxy-6-methyl-1,3,5-triazin-2-yl) N"-(methoxy)guanidine of the formula ##STR39##

4. A herbicidal composition comprising a herbicidally effective amount of a compound according to claim 1 in admixture with a diluent.

5. A method of combatting unwanted vegetation which comprises administering to such vegetation or to a habitat where such vegetation is to be grown a herbicidally effective amount of a compound according to claim 1.

6. The method according to claim 5, wherein such compound is

N-(2-biphenylylsulfonyl) N'-(4,6-dimethoxy-1,3,5-triazin-2-yl) N"-(methoxy)guanidine or

N-(2-biphenylylsulfonyl) N'-(4-methoxy-6-methyl-1,3,5-triazin-2-yl) N"-(methoxy)guanidine

and is applied to rice or a locus in which rice is grown thereby selectively to kill weeds.