Alkylphosphonodiamide herbicides
AssigneeImperial Chemical Industries PLC
InventorsMichael D. Broadhurst, Tsze H. Tsang
Life of this patent
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Abstract
Herbicides have the formula ##STR1## in which R.sub.1 is C.sub.2 -C.sub.8 alkyl or C.sub.5 -C.sub.8 cycloalkyl; R.sub.2 is hydrogen or C.sub.1 -C.sub.4 alkyl; R.sub.3 is phenyl, optionally substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 haloalkoxy, one or more halogens, one or two C.sub.1 -C.sub.4 alkoxy groups, one C.sub.1 -C.sub.4 alkyl and one C.sub.1 -C.sub.4 alkoxy groups, or if R.sub.2 is C.sub.1 -C.sub.4 alkyl, R.sub.3 may also be phenyl substituted by two C.sub.1 -C.sub.4 haloalkyl groups; pyridyl or tolylsulfonyl; R.sub.4 and R.sub.5 are independently C.sub.2 -C.sub.6 alkyl.
Claims40
A compound having the formula ##STR6## in which R.sub.1 is C.sub.3 -C.sub.6 alkyl or C.sub.5 -C.sub.6 cycloalkyl;
- R.sub.2 is C.sub.1 -C.sub.4 alkyl;
- R.sub.3 is phenyl, optionally substituted by methoxy, one or two methoxy groups, one methyl and one methoxy group, or one or two halogens;
- and
- R.sub.4 and R.sub.5 are independently C.sub.3 -C.sub.4 alkyl.
A method of controlling undesirable vegetation by applying to said vegetation or the locus thereof an herbicidally effective amount of a compound having the formula ##STR7## in which R.sub.1 is C.sub.3 -C.sub.6 alkyl or C.sub.5 -C.sub.6 cycloalkyl;
- R.sub.2 is C.sub.1 -C.sub.4 alkyl;
- R.sub.3 is phenyl, optionally substituted by methoxy, one or two methoxy groups, one methyl and one methoxy group, or one or two halogens;
- and
- R.sub.4 and R.sub.5 are independently C.sub.3 -C.sub.4 alkyl.
A method according to clam 20 in which R.sub.2 is isopropyl.
A method according to clam 20 in which R.sub.1 is n-propyl, R.sub.2 is methyl, R.sub.3 is 4-ethylphenyl, and R.sub.4 and R.sub.5 are both n-propyl.
Dependencies are inferred from the claim text.