Process for producing 4-benzoyl-5-hydroxypyrazoles
申请人:Nissan Chemical Industries Ltd.
公开号:US04942246A1
公开(公告)日:1990-07-17
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.