申请人:Eisai Co., Ltd.
公开号:EP0997461A1
公开(公告)日:2000-05-03
The present invention provides a method for producing sulfoxide useful as medicaments such as inhibitors of gastric acid secretion, anti-ulcer agents etc., or as intermediates for producing medicaments, at a high yield and a high purity in a safe manner.
A method for producing sulfoxide (II), comprising the step of oxidizing thioether (I) in the presence of an acid anhydride or a metal catalyst with a perborate, or a method for producing sulfoxide (II), comprising the step of oxidizing thioether (I) in the presence of a base with N-halosuccinimide, 1,3-dihalo-5,5-dimethylhydantoin or a dichloroisocyanurate:
wherein R1 is a hydrogen atom, a methoxy group or a difluoromethoxy group; R2 is a methyl group or a methoxy group; R3 is a 3-methoxypropoxy group, a methoxy group or a 2,2,2-trifluoroethoxy group; and R4 represents a hydrogen atom or a methyl group.
本发明提供了一种生产亚砜的方法,该亚砜可用作药物,如胃酸分泌抑制剂、抗溃疡剂等,或用作生产药物的中间体,产量高、纯度高且安全。
一种生产亚砜(II)的方法,包括在酸酐或金属催化剂存在下用过硼酸盐氧化硫醚(I)的步骤,或一种生产亚砜(II)的方法,包括在碱存在下用 N-卤代丁二酰亚胺、1,3-二卤-5,5-二甲基海因或二氯异氰尿酸酯氧化硫醚(I)的步骤:
其中 R1 是氢原子、甲氧基或二氟甲氧基;R2 是甲基或甲氧基;R3 是 3-甲氧基丙氧基、甲氧基或 2,2,2-三氟乙氧基;R4 代表氢原子或甲基。