PROCESS FOR THE PREPARATION OF PYRAZOLE

摘要

O F T H E D I S C L O S U R E Process for the Preparation of pyrazole, Process for the preparation of pyrazole by heating a pyrazoline derivative of the general formula (I) in which R represents an optionally substituted phenyl radicals or an alkyl or halogeno= alkyl radical, without the addition of an acid or base, at a temperature between 100 and 200.degree.C under a pressure between 1 mbar and 10 bars r optionally in the presence of a diluent. Le A 20 592