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)化合物与具有光学活性的
氨基醇反应,其中X如上所定义,而Y和Z各自代表一个离去基团,以形成第一种对映异构体混合物。