| 摘要 |
The present invention provides acetone complexes of sulfoxide compounds, useful as medicines such as inhibitors of gastric acid secretion and anti-ulcer agents or as intermediates for production of medicines, a process for producing the same and a purification method of using the same. Namely, it is the acetone complexes of sulfoxide compounds or of pharmaceutically acceptable salts thereof represented by the following formula: <IMG> (wherein R1 represents a hydrogen atom, a methoxy group or a difluoromethoxy group, R2 represents a methyl group or a methoxy group, R3 represents a 3 -methoxypropoxy group, a methoxy group or a 2,2,2 - trifluoroethoxy group, R4 represents a hydrogen atom or a methyl group, n and m independently represent an integer of 1 to 4, and B represents a hydrogen atom, an alkali metal atom or 1/2 alkaline earth metal atom), which are obtained by treating the sulfoxide compounds or pharmaceutically acceptable salts thereof with acetone.
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