2-Phenyl-5,6-dihydro-4-pyrone derivatives and herbicidal compositions in which they are present
US4316737A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1979 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Feb 27, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New 2-phenyl-5,6-dihydro-4-pyrone derivatives and herbicidal compositions in which they are present. They correspond to the general formula: ##STR1## in which: R.sub.1 and R.sub.2, which are identical or different, represent a hydrogen atom or an alkyl radical (C.sub.1 -C.sub.4), or together form an alkylene chain (C.sub.2 -C.sub.6), R.sub.3 represents an alkyl radical (C.sub.1 -C.sub.4), an alkenyl radical (C.sub.2 -C.sub.4), an alkynyl radical (C.sub.2 -C.sub.4), a halogenoalkyl radical (C.sub.1 -C.sub.4) or an alkoxyalkyl radical (C.sub.3 -C.sub.5), Y represents a halogen atom, an alkyl radical (C.sub.1 -C.sub.4) or an alkoxy radical (C.sub.1 -C.sub.4), and n represents an integer which can be equal to 1, 2 or 3, with the proviso that, when n is equal to 2 or 3, the radicals Y can be identical or different. These compounds can be used for selectively destroying weeds in crops such as sunflower, cotton, soft wheat, rice, soya bean, groundnut, bean and tomato plant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.