A process for preparation of optically pure or optically enriched enantiomers of sulphoxide compounds of formula (I), such as omeprazole and structurally related compounds, as well as their salts and hydrates. The said process comprises
a) providing, a mixture of enantiomers of the sulphoxide compound of formula (I) as starting material, in an organic solvent; said enantiomers having R and S configurations at the sulfur atom of the sulphoxide group;
b) treating the mixture of enantiomers, in the organic solvent, with a chiral host;
c) separating the adduct formed by the enantiomer and the chiral host;
d) if desired, repeating the operation of step (b);
e) treating the adduct obtained in step (c) or (d) with metal base selected from Group I and Group II metal, thereby obtaining metal salt of one of the optical isomers of the sulphoxide compound in optically pure or optically enriched form;
f) optionally, converting the Group I metal salt of optically pure or optically enriched form the optical isomers of the sulphoxide compound obtained in step (e) to magnesium salt.
一种制备式(I)的
硫氧化物化合物的光学纯或光学富集对映体的方法,例如
奥美拉唑和结构相关的化合物,以及它们的盐和
水合物。所述方法包括:a)在有机溶剂中提供式(I)的
硫氧化物化合物的对映体混合物作为起始物料;所述对映体在
硫氧化物基团的
硫原子处具有R和S构型;b)在有机溶剂中用手性宿主处理对映体混合物;c)分离由对映体和手性宿主形成的加合物;d)如果需要,重复步骤(b)的操作;e)用I组和II组
金属中选择的
金属碱处理步骤(c)或(d)中获得的加合物,从而获得
硫氧化物化合物的一个光学异构体的
金属盐,其光学纯或光学富集;f)可选地,将步骤(e)中获得的光学纯或光学富集的
硫氧化物化合物的一种光学异构体的I组
金属盐转化为
镁盐。