abstract |
A process for preparing 1,3-disubstituted pyrazolecarboxylic esters of the formula (I); where X, Y, Z = hydrogen or halogen and R 1 = C 1 -C 6 -alkyl, by metering an enol ether of the formula (III); where R 2 is C 1 -C 6 -alkyl at from (-41) to (-8O)°C into an alkyl hydrazine of the formula II H 2 N-NH-lower alkyl (II). |