Herbicidal derivatives of pyrid-2-yloxyphenoxy-acetic acids and esters
US4348221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1980 |
| Grant date | Sep 7, 1982 |
| Priority date | — |
| Expiry date | Jun 16, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/85
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New phenoxy-alkanecarboxylic acid derivatives which have a herbicidal action and which are effective in regulating plant growth are described. They correspond to the formula ##STR1## in which A is the cyano group, a carboxylic acid, a salt, ester, thioester or amide thereof, PA1 Q is a mono- to trisubstituted phenyl or pyrid-2-yl radical, PA1 R.sub.3 is hydrogen, halogen, cyano, nitro, alkyl or carbamoyl, PA1 R.sub.4 is alkyl, alkoxyalkyl, cycloalkyl, alkenyl, alkynyl, phenyl or benzyl, and PA1 X, Y and Z are each oxygen or sulfur. They can be used as selective herbicides in cereal and rice crops, or for reducing the vegetative growth, for example in soya-bean crops, and also for defoliation and desiccation in cotton or potato crops shortly before the harvesting thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.