Propionic acid esters

Details Propionic acid esters Propionic acid esters

C - Chemistry, Metallurgy

07

F

260/289, 260/291

C07F 9/58 (2006.01) A01N 57/24 (2006.01) C07F 9/40 (2006.01) C07F 9/60 (2006.01) C07F 9/6509 (2006.01) C07F 9/653 (2006.01) C07F 9/6541 (2006.01)

Patent

CA 1246571

-a- Abstract The invention is concerned with propionic acid esters of the formula Image I wherein A signifies one of the following groups (a) or (b) Image Image (a) (b) R signifies hydrogen, halogen, C1-4- alkyl, trifluoromethyl, C1-4-alkoxy or C1-4-alkylthio, X signifies oxygen, sulphur or -NR5-, Y signifies the methine group, i.e. the group -CH=, or a nitrogen atom, R1 signifies hydrogen or C1-4-alkyl and R2 signifies hydrogen, C1-4-alkyl, C1-4-haloalkyl or optionally mono- substituted or multiply substituted phenyl, the optionally present sub- stituents being halogen atoms, C1-4- -b- alkyl groups, C1-4-alkoxy groups and nitro groups, or R1 and R2 together with the carbon atom to which they are attached signify an optionally substituted C5-8- cycloalkane ring, the optionally present substituents being one to three C1-4-alkyl groups, R3 and R4 each independently signify C1-6-alkyl or phenyl, R5 signifies hydrogen or C1-4-alkyl, m, n and p each independently signify the number 0 or 1, the sum thereof being at least 1, and q signifies the number 1 or 2, a process for their manufacture, weed control compositions which contain these compounds as the active substance as well as the use of such com- pounds or compositions for the control of weeds.

447244

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