Preparation method for Mitiglinide calcium
A mitiglinide calcium and action technology, which is applied in the preparation field of mitiglinide calcium to achieve the effects of reducing environmental pollution, friendly reaction conditions and high yield
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Embodiment 1
[0025] Step 1: Preparation of 2-benzylidene succinic acid.
[0026] Feeding amount
[0027] raw material
molecular weight
Feeding amount
moles
The molar ratio of
146
5.85kg
40.1
1
106
2.12kg
20
0.5
54
1.52kg
28.1
0.7
-
5.7L
--
--
caustic soda
40
2.3kg
57.5
1.4
36.5
8.7L
88.7
2.2
[0028] Put dimethyl succinate, methanol, and sodium methoxide into the reaction kettle in turn, start stirring, turn on the heating system of the reaction kettle, and after reflux, add benzaldehyde dropwise. Continue to stir and reflux for a period of time, then heat to evaporate methanol, cool to room temperature, add about 23L caustic soda solution, heat to reflux for 1 hour, cool to room temperature, add ethyl acet...
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