Optically active herbicidal (r)-phenoxypropionic...

A - Human Necessities – 01 – N

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A01N 43/76 (2006.01) A01P 13/00 (2006.01)

Patent

CA 2465342

The present invention relates to optically active herbicidal (R)- phenoxypropionic acid N-methyl-N-2-fluorophenyl amide compounds represented in the following formula (1), a method for preparing thereof, their use to prevent generation of barnyard grass produced from rice and composition as suitable herbicides, (I) wherein X is hydrogen, halogen, hydroxy, NH2, CO2H, C1-C6 alkylamino substituted with 1 or 2 of C1-C3 alkyl, C1-C6 alkyl, C1-C6 alkoxy, C1-C3 haloalkyl, C1-C3 haloalkoxy, C2-C4 alkoxyalkoxy, C1-C4 alkylthonyl, C1-C4 alkylsulfonyl, C2-C6 alkenyl, C2-C6 alkinyl, C2-C6 alkenyloxy,C2-C6 alkinyloxy, C1-C3 alkoxycarbonyl, or C1-C3 alkylcarbonyl; is hydrogen or fluoro; and n is an integer of 0 to 2, wherein X can be a combination of other substituents when n is 2.

La présente invention concerne des composés d'amide N-méthyl-N-2-fluorophényl d'acide phénoxypropionique (R) représentés dans la formule suivante (1), un procédé de préparation associé, l'utilisation desdits composés dans la prévention de l'engendrement de pied-de coq produit à partir du riz, et une composition utilisée en tant qu'herbicides. Dans cette formule, X représente l'hydrogène, un halogène, l'hydroxy, NH¿2?, CO¿2?H, C¿1?-C¿6? alkylamino substitué par un ou deux composés parmi C¿1?-C¿3? alkyle, C¿1?-C¿6? alkyle, C¿1?-C¿6? alkoxy, C¿1?-C¿3? haloalkyle, C¿1?-C¿3? haloalkoxy, C¿2?-C¿4? alkoxyalkoxy, C¿1?-C¿4? alkylthonyl, C¿1?-C¿4? alkylsulfonyl, C¿2?-C¿6? alcényle, C¿2?-C¿6? alkinyle, C¿2?-C¿6? alkenyloxy, C¿2?-C¿6? alkinyloxy, C¿1?-C¿3? alkoxycarbonyle ou C¿1?-C¿3? alkylcarbonyle, Y représente l'hydrogéne ou un fluor, et n représente un nombre entier compris entre 0 et2, X pouvant être une combinaison d'autres substituants, lorsque n est égal à 2.

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