Process for producing 4-benzoyl-5-hydroxypyrazoles

Details Process for producing 4-benzoyl-5-hydroxypyrazoles Process for producing 4-benzoyl-5-hydroxypyrazoles

1992-05-20

1993-10-12

Ramsuer, Robert W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23120

Patent

active

RE0344087

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.

REFERENCES:
patent: 4643757 (1987-02-01), Baba et al.
Chemical Abstracts, vol. 105, No. 7, Aug. 18, 1986, Columbus, Ohio, U.S.A. Kikouno et al., "Pyrazole Derivatives"p. 615, col. 1, Abstract No. 60600s.

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