A method for producing a pyrazole compound of the general formula (5) includes reacting a 2-acyl-3-aminoacrylic acid ester of the general formula (1) with a hydrazine of the general formula (4) in the presence of a base
where R
1
, R
2
, R
3
and R
4
each independently represent an alkyl group
wherein R
5
represents an alkyl group or an aryl group
wherein R
1
, R
4
and R
5
have the same meanings as above.
It is possible by this production method to produce the 1,3-disubstituted pyrazol-4-carboxylic acid ester at a high yield and selectivity and with less discoloration.
一种生产通式(5)的
吡唑化合物的方法包括在碱存在下将通式(1)的2-酰基-3-
氨基
丙烯酸酯与通式(4)的
肼反应,其中R1、R2、R3和R4各自独立地代表烷基,在其中R5代表烷基或芳基,其中R1、R4和R5具有与上述相同的含义。通过这种生产方法可以高产率和选择性地生产1,3-二取代的
吡唑-4-羧酸酯,并减少变色。