Process for producing 4-benzoylpyrazoles
US4415739A · kind A · utility
1Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1982 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Jul 20, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D231/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
4-Benzoyl-5-hydroxypyrazoles useful as herbicidal active ingredients, their intermediate or stabilizers against heat, oxidation or ultraviolet light are produced by a condensation of a pyrazolone, tetrachloromethane and a benzene compound in the presence of an aluminium halide, followed by a hydrolysis reaction with industrial advantages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.