Process for the preparation of derivatives of 1-substituted-3-fluoroalkyl-pyrazole-4-carboxylic acid in the presence of ammonium salt

摘要: A process for the manufacture of a compound general formula (I) wherein - Y is H, F, an alkyl group, cycloalkyl aralkyl group or aryl R 1 H organic residue, 2 residue ; which comprises submitting (II) as defined above, 1, 2, X Cl, Br, I, CN, sulphate sulphonate to reduction reaction in presence ammonium salt.