A highly pure optically active proton pump inhibitor compound can be produced safely and inexpensively in a high yield and enantioselectivity by a method of producing an optically active sulfoxide of Formula 2 or a salt thereof, comprising oxidizing a sulfide of Formula 1 or a salt thereof with hydrogen peroxide using an iron salt in the presence of a chiral ligand of Formula 3; wherein A is CH or N; R1 is hydrogen atom, an alkyl optionally substituted by halogen(s), or an alkoxy optionally substituted by halogen(s); one to three R2 may exist, and each of R2 is independently an alkyl, a dialkylamino, or an alkoxy optionally substituted by halogen(s) or alkoxy(s); each of R3 is independently hydrogen atom, a halogen, cyano or the like; R4 is a tertiary alkyl; and * and ** represent respectively R configuration or S configuration.
一种高纯度的光学活性质子泵
抑制剂化合物可以通过一种生产Formula 2的光学活性亚砜或其盐的方法安全、廉价地高产和对映选择性地生产,该方法包括在存在Formula 3的手性
配体的情况下,使用
过氧化氢氧化Formula 1的
亚硫酸盐或其盐,其中A为CH或N;R1为氢原子,一种或多种卤素取代的烷基,或一种或多种卤素取代的烷氧基;可能存在一到三个R2,每个R2独立地是烷基、二烷基胺基或一种或多种卤素或烷氧基取代的烷氧基;每个R3独立地是氢原子、卤素、
氰基或类似物;R4是三级烷基;*和**分别表示R构型或S构型。