The present invention relates to a novel process for the preparation of a diastereomeric mixture of piperidinylaminomethyl trifluoromethyl cyclic ether compounds of formulae Ia and Ib:
and pharmaceutically acceptable salts thereof, wherein R1 is C1-C6 alkyl; R2 is C1-C6 alkyl, halo C1-C6 alkyl or phenyl or substituted phenyl; R3 is hydrogen or halo; m is zero, one or two, and wherein said mixture is highly enriched in the compound of formula Ia, and to novel processes for the preparation and purification of intermediate compounds useful in the preparation of compounds of formulae Ia and Ib.
本发明涉及一种制备式 Ia 和 Ib 的
哌啶基氨基甲基三
氟甲基
环醚化合物非对映异构体混合物及其药物可接受盐的新工艺:
及其药学上可接受的盐,其中R1为C1-C6烷基;R2为C1-C6烷基、卤代C1-C6烷基或苯基或取代苯基;R3为氢或卤代;m为0、1或2,且所述混合物高度富含式Ia化合物,以及制备和纯化用于制备式Ia和Ib化合物的中间体化合物的新工艺。