The present invention provides a process for the production of a 2-[4-(3-methoxypropoxy)-3-methylpyridin-2-yl}methylsulfinyl]-1 H-benzimidazole alkali metal salt (1), which is a drug or an intermediate for the production of a drug, the process not requiring large-scale equipment and being excellent in terms of workability, operability and energy conservation. According to the present invention, there is disclosed a process for the production of a salt precipitate represented by formula (1)
(wherein B represents an alkali metal ion), the process comprising the steps of:
dissolving the compound represented by formula (2)
in a first organic solvent and adding an alkali metal hydroxide, or dissolving the alkali metal hydroxide in the first organic solvent and adding the compound represented by formula (2); and further adding a second organic solvent to a reaction mixture obtained.
本发明提供了一种生产2-[4-(3-甲氧基丙氧基)-3-
甲基吡啶-2-基}甲基砜基]-1 H-
苯并咪唑碱
金属盐(1)的方法,该方法是一种药物或药物中间体的生产方法,该方法不需要大规模设备,在工作性能、操作性和节能方面表现出色。根据本发明,揭示了一种生产由公式(1)表示的盐沉淀物的方法(其中B代表碱
金属离子),该方法包括以下步骤:在第一有机溶剂中溶解由公式(2)表示的化合物并加入碱
金属氢氧化物,或在第一有机溶剂中溶解碱
金属氢氧化物并加入由公式(2)表示的化合物;并进一步向所得的反应混合物中加入第二有机溶剂。