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.
本发明涉及一种新型工艺,用于制备式Ia和Ib的
哌啶基氨甲基三
氟甲基
环醚化合物的对映体混合物,以及其药用可接受的盐,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为氢或卤素;m为零、一或二,所述混合物在化合物Ia的式中富集,并且涉及用于制备化合物Ia和Ib的中间化合物的制备和纯化的新型工艺。