Disclosed a method for preparing a compound of Formula 1,
wherein R
1
is cyclopropyl, 4-chlorophenyl or 4-bromophenyl; and R
2
is C
1
-C
14
alkyl; comprising contacting a compound of Formula 2
with a persulfate oxidant in the presence of a strong sulfur- or phosphorus-containing mineral acid and an oxidation resistant solvent. Also disclosed are methods for preparing the compound of Formula 2 from a compound of Formula 5
as well as compounds of Formula 6 and salts thereof,
wherein R is NH
2
, Cl or OH; X is H or Cl; R
1
is cyclopropyl, 4-chlorophenyl or 4-bromophenyl; and R
2
is C
1
-C
14
alkyl; provided that when R is NH
2
or Cl, then X is Cl; which are useful a process intermediates.
Compounds of Formula I, and their N-oxides and agriculturally suitable salts, are disclosed which are useful for controlling undesired vegetation wherein R
1
is cyclopropyl optionally substituted with 1-5 R
5
, isopropyl optionally substituted with 1-5 R
6
, or phenyl optionally substituted with 1-3 R
7
; R
2
is ((O)
j
C(R
15
)(R
16
))
k
R; R is CO
2
H or a herbicidally effective derivative of CO
2
H; R
3
is halogen, cyano, nitro, OR
20
, SR
21
or N(R
22
)R
23
; R
4
is —N(R
24
)R
25
or —NO
2
; j is 0 or 1; and k is 0 or 1; provided that when k is 0, then j is 0; and R
5
, R
6
, R
7
, R
15
, R
16
, R
20
, R
21
, R
22
, R
23
, R
24
and R
25
are as defined in the disclosure. Also disclosed are compositions comprising the compounds of Formula I and a method for controlling undesired vegetation which involves contacting the vegetation or its environment with an effective amount of a compound of Formula I. Also disclosed are compositions comprising a compound of Formula I and at least one additional active ingredient selected from the group consisting of an other herbicide and a herbicide safener.
Compounds of Formula I, and their N-oxides and agriculturally suitable salts, are disclosed which are useful for controlling undesired vegetation
wherein
R
1
is cyclopropyl optionally substituted with 1-5 R
5
, isopropyl optionally substituted with 1-5 R
6
, or phenyl optionally substituted with 1-3 R
7
;
R
2
is ((O)
j
C(R
15
)(R
16
))
k
R;
R is CO
2
H or a herbicidally effective derivative of CO
2
H;
R
3
is halogen, cyano, nitro, OR
20
, SR
21
or N(R
22
)R
23
;
R
4
is —N(R
24
)R
25
or —NO
2
;
j is 0 or 1; and k is 0 or 1; provided that when k is 0, then j is 0;
and R
5
, R
6
, R
7
, R
15
, R
16
, R
20
, R
21
, R
22
, R
23
, R
24
and R
25
are as defined in the disclosure.
Also disclosed are compositions comprising the compounds of Formula I and a method for controlling undesired vegetation which involves contacting the vegetation or its environment with an effective amount of a compound of Formula I. Also disclosed are compositions comprising a compound of Formula I and at least one additional active ingredient selected from the group consisting of an other herbicide and a herbicide safener.
Disclosed a method for preparing a compound of Formula 1,
wherein R1 is cyclopropyl, 4-chlorophenyl or 4-bromophenyl; and R2 is C1-C14 alkyl; comprising contacting a compound of Formula 2
with a persulfate oxidant in the presence of a strong sulfur- or phosphorus-containing mineral acid and an oxidation resistant solvent. Also disclosed are methods for preparing the compound of Formula 2 from a compound of Formula 5
as well as compounds of Formula 6 and salts thereof,
wherein R is NH2, Cl or OH; X is H or Cl; R1 is cyclopropyl, 4-chlorophenyl or 4-bromophenyl; and R2 is C1-C14 alkyl; provided that when R is NH2 or Cl, then X is Cl; which are useful a process intermediates.