Process for producing 4-benzoyl-5-hydroxypyrazoles
US4942246A · kind A · utility
20Cited by
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1Claims
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Key dates
| Filing date | Jun 2, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Jun 2, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C331/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a 4-benzoyl-5-hydroxylpyrazole of the formula III: ##STR1## which comprises reacting carbon monoxide and a 5-hydroxypyrazole of the formula II: ##STR2## to a substituted benzene of the formula I: ##STR3## wherein X is a bromine atom, an iodine atom or a diazonium tetrafluoroboron salt group, in the presence of a base and a catalyst of Group VIII of the Periodic Table.
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