4-(5-fluoromethyl-2-pyridyloxy)phenoxy- alkanecarboxylic...

C - Chemistry – Metallurgy – 07 – D

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260/297, 71/8.1,

C07D 213/64 (2006.01) A01N 43/40 (2006.01) A01N 47/12 (2006.01) C07D 213/643 (2006.01)

Patent

CA 1243321

ABSTRACT OF THE DISCLOSURE This invention relates to and discloses novel 4-(5- fluoromethyl-2-pyridyloxy)phenoxyalkanecarboxylic acids and derivatives thereof of the general formula (I); Image (I) wherein X is a fluorine atom or a chlorine atom; Y is a hydrogen atom or a chlorine atom; R is a hydrogen atom, a methyl group or an ethyl group; n is 0 or 2; and Zl is a hydroxy group; a (C1-C6)- alkoxy group in which the alkyl moiety thereof may be substituted with 1 to 3 halogen atoms; a (C1-C4)alkoxy(C1-C4)alkoxy group; a (C2-C4)alkenyloxy group; a (C2-C4)alkynyloxy group; a (C3-C6)- cycloalkoxy group in which the cycloalkyl moiety thereof may be substituted with a (C1-C4)alkyl group; a (C1-C4)alkoxycarbonyl- (C1-C4)alkoxy group; a phenoxy group in which the aryl moiety thereof may be substituted with 1 to 3 halogen atoms or a (C1-C4)- alkyl group; a benzyloxy group; a glycidyloxy group; a (C1-C6)- alkylthio group; a (C2-C4)alkenylthio group; a phenylthio group in which the aryl moiety thereof may be substituted with 1 to 3 halogen atoms or a (C1-C4)alkyl group; an amino group; a (C1-C4)- alkylamino group; a (C1-C4)alkoxycarbonylmo-thylamino group; a hydroxycarbonylmethylamino group; an anilino group in which the aryl moiety thereof may be substituted with 1 to 3 halogen atoms; a pyridine-2-ylamino group; an -O-cation; or a halogen atom, which have herbicidal properties. These compounds have a strong selective herbicidal activity toward gramineous weeds, and can be used with high safety on broad-leaved crops.

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