Enantiomerically enriched (S)-(-)-3-N-methylamino-l-(2-thienyl)-1-propanol or (R)-(+)-3-N-methylamino-l-(2-thienyl)-l-propanol of the formulae, or mirror image are prepared by i) treating an enantiomeric mixture of the amines Ia and Ib with (-)-2,3:4,6-di-O-isopropylidene-2-keto-L-gulonic acid or (+)-2,3:4,6-di-O-isopropylidene-2-keto-D-gulonic acid of the formulae (IIa) or mirror image ii) crystallizing the obtained diastereomerically enriched salts from the reaction mixture obtained in step i), iii) optionally recrystallizing said diastereomerically enriched salts IIIa or IVb, and iv) treating the diastereomerically enriched salts IIIa or IVb obtained in step ii) or step iii) with a base to liberate the enantiomerically enriched amines Ia or Ib.
通过以下步骤制备具有公式的对映体富集的(S)-(-)-3-N-甲基
氨基-1-(2-
噻吩基)-1-
丙醇或(R)-(+)-3-N-甲基
氨基-1-(2-
噻吩基)-1-
丙醇,或其镜像:i) 用(-)-2,3:4,6-二-O-异丙基亚甲基-L-古洛酸或(+)-2,3:4,6-二-O-异丙基亚甲基-D-古洛酸的公式(IIa)或其镜像处理
氨基化合物Ia和Ib的对映异构体混合物,ii) 从步骤i)中得到的反二分体富集盐中结晶化,iii) 可选地再结晶所述的反二分体富集盐IIIa或IVb,以及iv) 用碱处理从步骤ii)或步骤iii)中得到的反二分体富集盐IIIa或IVb,以释放对映体富集的
氨基化合物Ia或Ib。