1,2,4-triazole phosphonic acid derivatives

C - Chemistry – Metallurgy – 07 – F

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260/313, 260/386

C07F 9/6518 (2006.01) A01N 57/24 (2006.01)

Patent

CA 1179679

Abstract Phosphonic acid derivatives of the formula (I) Image (I) wherein R1 and R2 are each, hydrogen, a catio or an ester group; R3 is hydrogen or alkyl; and R4 may be H, F, NH2, optionally substituted alkoxy, alkenyloxy or alkynyloxy, or a range of specified acyloxy radicals, or R3 and R4 with the adjacent carbon atom may form a keto group or a functional derivative thereof. The compounds are useful as herbicides.

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