The present invention provides a process for preparing lansoprazole (LNP) (I) and related compounds having a high yield and a low level of impurities by oxidation of corresponding sulfide (compound having formula (II)) with tert-butyl hydroperoxide (TBHP), catalyzed by a catalyst vanadium oxytrichloride in an organic solvent selected from the group consisting of a C1-C5 alkanol, decane, nonane, toluene and a mixture of the organic solvent and water, preferably in the presence of a base.
本发明提供了一种制备
兰索拉唑(LNP)(I)及相关化合物的方法,通过在有机溶剂中使用
叔丁基过氧化氢(
TBHP)催化剂三
氯氧
钒氧化相应的
硫化物(具有公式(II)的化合物),所选择的有机溶剂来自由C1-C5烷基醇、
癸烷、
壬烷、
甲苯和有机溶剂与
水的混合物组成,优选在碱存在下进行,其产率高,杂质含量低。