Purification of hydroxyphenylpropionic acid ester

Details Purification of hydroxyphenylpropionic acid ester Purification of hydroxyphenylpropionic acid ester

C - Chemistry, Metallurgy

07

D

260/373.1

C07D 493/10 (2006.01)

Patent

CA 1249838

ABSTRACT A method as described for the purification of a hydroxyphenylpropionic acid ester represented by the structural formula: Image (I). by means of recrystallization in a solvent mixture at a temperature lower than 40°C. According to the method of the invention, the hydroxyphenylpropionic acid ester can be obtained as a white crystalline mixture of the .alpha. and .beta. crystalline form in good purity without the formation of the .gamma. crystalline form. The desired crystalline forms are easily confirmed by a characteristic X-ray diffraction pattern. The invention is very useful as an industrial method for the purification of the hydroxyphenylpropionic acid ester.

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