Herbicidal tetrahydro(thio)pyran-2,4-dione derivatives

Details Herbicidal tetrahydro(thio)pyran-2,4-dione derivatives Herbicidal tetrahydro(thio)pyran-2,4-dione derivatives

1988-01-12

1989-06-27

Lee, Mary C.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 90, 549 13, 549 28, 549 60, 549377, 549414, 549415, A01N 4316, A01N 4318, C07D40704, C07D40904

Patent

active

048426385

ABSTRACT:
Tetrahydro(thio)pyran-2,4-dione derivatives of the formula ##STR1## where R.sup.1 is hydrogen, a cation, alkylcarbonyl, C.sub.2 -C.sub.10 -alkenylcarbonyl, or benzoyl which is unsubstituted or substituted by alkyl, R.sup.2 is alkyl, R.sup.3 is a non-aromatic, unsubstituted or alkyl-substituted heterocyclic compound of 5 to 7 ring members and having at most one double bond in the heterocyclic ring, X is oxygen or sulfur, and Z is oxygen or the radical NO--R.sup.4, R.sup.4 denoting alkyl, alkenyl, alkynyl, haloalkyl, hal oalkenyl, alkoxyalkyl or the radical CH.sub.2 --R.sup.5, where R.sup.5 is a he terocyclic compound of 5 ring members and containing from 1 to 3 hetero-atoms and from 0 to 2 double bonds and bearing either no substituents or one or two substituents selected from the group consisting of alkyl, alkoxy, halogen, trifluoromethyl, alkoxymethyl, alkylthiomethyl and vinyl, or R.sup.5 is phenyl which is unsubstituted or bears from one to three substituents selected from the group consisting of alkyl, alkoxy, halogen, trifluoromethyl, nitro and dialkylamino, and their use for combating unwanted plant growth and for regulating plant growth.

REFERENCES:
Shandala et al., J. Heterocyclic Chem. 21, 1755 (1984).
Seebach & Meyer, Angew. Chem. 86, 40 (1974).

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