Patent ID: 8299260
Filing Date: 2012-10-30
Classification: C07D

Abstract:
1. A process for preparing an aryl-substituted pyrazole of general formula (I) in which R R R Z is CH or N, characterized in that (A) an alkoxyenone or an enaminoketone of formula (II) in which R X is, chlorine, bromine or iodine, R is reacted with an arylhydrazine of the formula (III) in which R Z is CH or N, to give a 1-aryl-substituted dihydro-1H-pyrazole of the formula (IV) in which X, R (B) the latter is optionally converted further, without preceding isolation, with elimination of water, to a 1-aryl-substituted trihalomethylpyrazole of the formula (V) in which X, R (C) the compound of the general formula (V) is converted with addition of HC1, H in which R (D) the latter is converted, after detaching the R in which R (E) the latter is converted to a compound of the formula (I)