| abstract |
Process for the manufacture of an ester or the respective free acid of a 1-substituted-3-fluoroalkyl-pyrazole-4-carboxylic acid of formula (I) wherein - Y is H, F or an alkyl group having from 1 to 12 carbon atoms which is optionally substituted by at least one halogen atom, an aralkyl group or an aryl group, - R 1 is H or an organic residue, - R 2 is H or an organic residue, which comprises submitting a compound of formula (II) wherein Y is as defined above - X is CI, Br or I, - R 1 is H or an organic residue, - R 2 is H or an organic residue, to a reduction reaction. |