Claims
- 1. A herbicidally active compound or a resolved optically-active isomer thereof having the formula ##STR36## wherein R.sup.1 represents a C.sub.1 -C.sub.3 alkyl group; or an agriculturally acceptable derivative of the alkanoic acid group thereof that can be hydrolyzed and/or oxidized in plants or soil to said alkanoic acid moiety that, depending on the pH, is in the undissociated and/or dissociated form.
- 2. A compound of claim 1 which is the R-enantiomer.
- 3. A compound of claim 1 which is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid or an agriculturally acceptable salt or ester thereof.
- 4. A compound of claim 3 which is the R-enantiomer.
- 5. A compound of claim 2 which is the methyl, ethyl, propyl or butyl ester.
- 6. A compound of claim 5 which is the R-enantiomer.
- 7. The compound of claim 5 which is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid methyl ester.
- 8. The compound of claim 7 which is the R-enantiomer.
- 9. A composition comprising a herbicidally effective amount of one or more active compounds of claim 1 together with an agriculturally acceptable adjuvant, carrier or diluent.
- 10. A composition of claim 9 wherein the active compound is the R-enantiomer.
- 11. A composition of claim 9 wherein the active compound is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid or an agriculturally acceptable salt or ester thereof.
- 12. A composition of claim 11 wherein the active compound is the R-enantiomer.
- 13. A composition of claim 11 wherein the active compound is the methyl, ethyl, propyl or butyl ester.
- 14. A composition of claim 13 wherein the active compound is the R-enantiomer.
- 15. A composition of claim 13 wherein the active compound is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid methyl ester.
- 16. A composition of claim 15 wherein the active compound is the R-enantiomer.
- 17. A method of killing or controlling grassy weeds which comprises applying to the locus of the grassy weeds a composition as claimed in claim 9.
- 18. A method as claimed in claim 17 wherein the composition is applied postemergently.
- 19. A method as claimed in claim 18 wherein the composition is applied postemergently to control undesired grassy vegetation in the presence of broadleaf crops.
- 20. A method as claimed in claim 18 wherein the composition is applied postemergently to control undesired grassy vegetation in the presence of wheat, barley or rice.
- 21. A method as claimed in claim 20 wherein the composition is applied postemergently to control undesired grassy vegetation in the presence of rice.
- 22. A method as claimed in claim 21 wherein the composition contains the active compound 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid or an agriculturally acceptable salt or ester thereof.
- 23. A method as claimed in claim 22 wherein the active compound is the R-enantiomer.
- 24. A method as claimed in claim 22 wherein the active compound is the methyl, ethyl, propyl or butyl ester.
- 25. A method as claimed in claim 24 wherein the active compound is the R-enantiomer.
- 26. A method as claimed in claim 24 wherein the active compound is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid methyl ester.
- 27. A method as claimed in claim 26 wherein the active compound is the R-enantiomer.
- 28. A method of killing or controlling undesired grassy vegetation, which method comprises prividing in the vegetation a compound in the undissociated and/or dissociated form of the formula ##STR37## wherein R.sup.1 represents a C.sub.1 -C.sub.3 alkyl.
- 29. A method of killing or controlling undesired grassy vegetation, which method comprises providing in the vegetation 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid in the undissociated and/or dissociated form.
- 30. The compound of claim 5 which is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid n-butyl ester.
- 31. The compound of claim 30 which is the R-enantiomer.
- 32. A composition of claim 13 wherein the active compound is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid n-butyl ester.
- 33. A composition of claim 32 wherein the active compound is the R-enantiomer.
- 34. A method as claimed in claim 24 wherein the active compound is 2-(4-(2'-fluoro-4'-cyanophenoxy)phenoxy)propionic acid n-butyl ester.
- 35. A method as claimed in claim 34 wherein the active compound is the R-enantiomer.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of applicants' copending application Ser. No. 082,030, filed Aug. 5, 1987 now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (12)
Number |
Date |
Country |
2646124 |
Oct 1976 |
DEX |
2730591 |
Dec 1978 |
DEX |
2834744 |
Mar 1979 |
DEX |
1142534 |
Dec 1976 |
JPX |
005935 |
Jan 1979 |
JPX |
031758 |
Feb 1984 |
JPX |
9116255 |
Jul 1984 |
JPX |
62-53 |
Jan 1987 |
JPX |
62-12755 |
Jan 1987 |
JPX |
7013949 |
Mar 1987 |
JPX |
1545001 |
Apr 1979 |
GBX |
8604895 |
Aug 1986 |
WOX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
82030 |
Aug 1987 |
|