Selectively herbicidal 4,6-dibromo-5-hydroxy-2-pyridine carboxam

Details Selectively herbicidal 4,6-dibromo-5-hydroxy-2-pyridine carboxam Selectively herbicidal 4,6-dibromo-5-hydroxy-2-pyridine carboxam

1975-10-29

1977-05-24

Drezin, Norman A.

Chemistry: fertilizers

Processes and products

Forms or conditioning

2602472A, 260295R, 2602472B, 260295AM, 26029351, 260240R, 260240K, A01N 922, C07D21355, C07D21356

Patent

active

040253333

ABSTRACT:
The invention is a genus of compounds of the formula ##STR1## wherein X is --OH, --OM, --OR or --NH.sub.2 ; Y is H, M or R'C0--; R is a primary or secondary C.sub.1 --C.sub.12 alkyl group, a C.sub.5 --C.sub.7 cycloalkyl group, phenyl or a C.sub.7 --C.sub.12 phenalkyl or alylphenyl group; R' is a C.sub.1 --C.sub.11 alkyl or alkenyl group, a C.sub.5 --C.sub.7 cycloalkyl or cycloalkenyl group, phenyl or a C.sub.7 --C.sub.12 phenyl alkyl, phenylalkenyl, alkylphenyl or alkenylphenyl group and M, independently, is a metal or ammonium cation. The compounds in which X is --NH.sub.2 are uniquely selective post-emergent herbicides for control of both broadleaf weeds and wild oats in grains such as wheat and barley. The compounds in which X is not NH.sub.2 have utility as intermediates and some of them are biologically active.

REFERENCES:
patent: 3317549 (1967-05-01), Johnston
patent: 3761486 (1973-09-01), McGregor
patent: 3862952 (1975-01-01), Marley
patent: 3894862 (1975-07-01), Whitaker et al.
patent: 3914239 (1975-10-01), Kuhnis et al.
Heyns et al., Chemical Abstracts 49:10288-10289, (1955).
Undheim et al., Chemical Abstracts 71:30366g, (1969).

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