Trifluoromethanesulfonamide derivative and a herbicide containin

Details Trifluoromethanesulfonamide derivative and a herbicide containin Trifluoromethanesulfonamide derivative and a herbicide containin

1990-01-26

1991-07-30

Lee, Mary C.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 88, 71 90, 549 23, 549404, A01N 4316, A01N 4318, C07D30914, C07D33506

Patent

active

050357395

ABSTRACT:
The present invention relates to a trifluoromethanesulfonamide derivative represented by the general formula given below, a herbicide with the derivative as the active ingredient and a method for the preparation of the derivative. ##STR1## [In the formula, X is a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or a haloalkyl group having 1 to 4 carbon atoms, n is 1, 2 or 3 and A is --O--CR.sup.3 R.sup.4 --, --S--CR.sup.3 R.sup.4 --, --SO--CR.sup.3 R.sup.4 --, --SO.sub.2 --CR.sup.3 R.sup.4 -- or --SO.sub.2 --NR.sup.3 --. And, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.]
These compounds are prepared depending on A in the above given general formula by the reaction of an amine derivative and a trifluoromethanesulfonyl halide or trifluoromethanesulfonic anhydride or by the oxidation of a thiochroman ring-containing trifluoromethanesulfonamide derivative.
Further, these trifluoromethanesulfonamide derivatives are useful as a herbicide and serve to weeding of weeds without phytotoxicity against crops in upland field. These trifluoromethanesulfonamide derivatives can also be used as a plant growth regulator.

REFERENCES:
patent: 3629332 (1971-12-01), Harrington et al.
patent: 4244960 (1981-01-01), Schroder et al.

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