The present invention relates to processes for preparing a compound of the general formula (Ia)
wherein X is a halogen atom, or a pharmaceutically acceptable salt thereof, wherein a compound of the formula (II)
wherein X is as defined above and Y and Z independently represent a leaving group each, is reacted with an optically active amino alcohol to form a first mixture of diastereomers.
本发明涉及制备一般式(Ia)化合物的过程,其中X是卤素原子或其药学上可接受的盐。其中,将一种式(II)化合物与光学活性
氨基醇反应,其中X如上所定义,Y和Z独立地表示每个离去基团,以形成第一混合物的对映异构体。