申请人:——
公开号:US20030162840A1
公开(公告)日:2003-08-28
1
Accordingly, the present invention provides a process for the preparation of a compound of formula (I) or a single enantiomer thereof, or a salt or a solvate thereof, wherein W is a chiral auxiliary or hydrogen and P
1
and P
2
are each independently selected from hydrogen or a protecting group, which comprises: a) treatment of a compound of formula (II), or a salt or a solvate thereof, wherein W is a chiral auxiliary and P
1
and P
2
are each independently selected from hydrogen or a protecting group, with a compound of formula (III); b) treatment of the resulting product with a reducing agent; c) if required, deprotection to yield the compound of formula (I), or a salt or solvate thereof. In particular there is provided a process for producing a substantially pure single enantiomer of salmeterol.
因此,本发明提供了一种制备式(I)化合物或其单一对映体或其盐或溶剂化物的过程,其中W是手性辅助基或氢,P1和P2各自独立地选自氢或保护基,包括以下步骤:a)用式(II)化合物或其盐或溶剂化物(其中W是手性辅助基,P1和P2各自独立地选自氢或保护基)与式(III)化合物处理;b)用还原剂处理所得产物;c)如有需要,去保护基以得到式(I)化合物或其盐或溶剂化物。特别地,本发明提供了一种制备沙美特罗单一对映体的高纯度过程。