Herbicidally active 2-substituted 5-phenoxyphenylphosphonic...

Details Herbicidally active 2-substituted 5-phenoxyphenylphosphonic... Herbicidally active 2-substituted 5-phenoxyphenylphosphonic...

C - Chemistry, Metallurgy

07

F

260/501.1, 260/5

C07F 9/38 (2006.01) A01N 57/22 (2006.01) A01N 57/30 (2006.01) A01N 57/34 (2006.01) C07F 9/40 (2006.01) C07F 9/42 (2006.01) C07F 9/44 (2006.01)

Patent

CA 1146576

Abstract of the Disclosure The present invention relates to novel herbicidal and plant growth-inhibiting 2-substituted 5-phenoxyphenylphosphonic acid derivatives of the formula Image (I) wherein each of R1 and R2 independently is hydroxyl, lower alkoxy, lower alkylthio, alkylamino, dialkylamino, chlorine, benzyloxy or benzylthio, X is halogen or a -CF3, - NO2, -CN, -CONH2 or -CSNH2 group, n is 0 to 3, and Y is -OH, halogen, NO2, -CN, NH2, -NHCO-R, -NHCOOR or -NH-SO2-R, wherein R is an unsubstituted or halogenated lower alkyl radical. Preferred compounds are 2-nitro-5-(2'-chloro-4'- trifluoromethylphenoxy)-phenylphosphonic acid and the lower dialkyl esters thereof. The invention also relates to the production of the novel phosphonic acid derivatives, starting from a 3,4-dinitrodiphenyl ether and reacting it with a trialkylphosphite as first step. The invention further relates to herbicidal and plant growth-regulating composition which contain one of the novel compounds as

345009

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