The present invention relates to a production method of a crystal of (R)-lansoprazole or (S)-lansoprazole, which includes crystallization at a temperature of about 0° C. to about 35° C. from a C
1-4
alkyl acetate solution containing (R)-lansoprazole or (S)-lansoprazole at a concentration of about 0.1 g/mL to about 0.5 g/mL and the like. According to the production method of the present invention, a crystal of (R)-lansoprazole or (S)-lansoprazole superior in preservation stability can be produced efficiently on an industrial large scale.
本发明涉及一种(R)-lansoprazole或(S)-lansoprazole晶体的生产方法,其包括在约0℃至约35℃的温度下从含有浓度约为0.1克/毫升至约0.5克/毫升的C1-4烷基
乙酸酯溶液中结晶等步骤。根据本发明的生产方法,可以高效地在工业大规模上生产出具有优异保持稳定性的(R)-lansoprazole或(S)-lansoprazole晶体。