Patent ID: 6235911
Filing Date: 2001-05-22
Classification: C07D

Abstract:
A process for preparing a 5-aminopyrazole-4-carboxylate derivative represented by the formula (1): ##STR13##wherein R.sup.1 is a straight or branched C1 to C4 alkyl group which can be substituted with a halogen atom, R.sup.2 is a hydrogen atom, straight or branched C1 to C4 alkyl group or an unsubstituted or substituted phenyl group, and R.sup.3 is a straight or branched C1 to C4 alkyl group, comprising reacting a compound represented by the formula (2) ##STR14##wherein R.sup.1 and R.sup.3 are the same as above, M is an alkali metal, and kinked line is a single bond showing that the compound of the formula (2) is unrestricted to one of E-isomer or Z-isomer, with a hydrazine compound represented by the formula (3): ##STR15##wherein R.sup.2 is the same as above, or a hydrate, hydrochloride, hydrobromide or sulfate of the same.