# US 4,394,157 A · Pyridyl-2-oxyphenyloxime derivatives and their use as herbicides

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- Number: US 4,394,157 A
- Document ID: US4394157A
- Status: Granted
- Kind: A
- Application number: 06/340,676
- Filed: 1982-01-19
- Granted: 1983-07-19
- Earliest claimed: 1979-08-07
- Assignees: Ciba-Geigy Corporation
- Inventors: Georg Pissiotas; Hermann Rempfler
- Web page: https://patentgrep.com/patent/US4394157A

## CPC

- C07D 213/643: 2-Phenoxypyridines; Derivatives thereof
- A01N 43/40: six-membered rings
- A01N 47/06: containing —O—CO—O— groups; Thio analogues thereof
- A01N 47/24: containing the groups [IMAGE cpc-sch-A01N-0944.gif], [IMAGE cpc-sch-A01N-0945.gif] or[IMAGE cpc-sch-A01N-0946.gif]; Thio analogues thereof
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS

## Abstract

The invention relates to novel pyridyl-2-oxy-phenyloxime derivatives of the formula ##STR1## wherein Q is an aliphatic or araliphatic ether or ester radical as defined in the specification, R.sub.1 is hydrogen, halogen, or a cyano, nitro, lower alkyl or halomethyl group, R.sub.2 is halogen, R.sub.3 is hydrogen, the nitro or cyano group, n is 0, 1 or 2 and X is hydrogen, halogen or a member selected from the group consisting of cyano, nitro, lower alkyl, lower alkanoyl, carboxylic acid lower alkyl ester or carboxamide. These compounds have good selective herbicidal action, they inhibit plant growth, and they can be employed as safeners for protecting cultivated plants from the phytotoxic action of aggressive agrochemicals.

## Claims

### Claim 1

A compound of the formula ##STR17## wherein R.sub.1 is halogen or trifluoromethyl,
X is methyl or cyano, and
Q is lower cyanoalkyl.

### Claim 2 (depends on 1)

5-(3,5-Dichloropyridyl-2-oxy)-acetophenyloxime cyanomethyl ether according to claim 1.

### Claim 3 (depends on 1)

A method of selectively controlling weeds in crops of cultivated plants, which comprises applying to said crops a herbicidally effective amount of a compound of claim 1.

### Claim 4 (depends on 1)

A herbicidal composition which contains (1) as active ingredient a herbicidally effective amount of a compound according to claim 1 and (2) an inert carrier.