The present invention provides a process for preparing a novel phenylalanine derivative of the formula (I): wherein X1 is a halogen atom, X2 is a halogen atom, Q is a group of the formula -CH2- or -(CH2)2- and Y is a lower alkyl group, or a pharmaceutically acceptable salt thereof, which has excellent inhibitory effects on α4 integrin-mediated cell adhesion, and an intermediate useful in the process.
本发明提供了一种制备新型苯丙
氨酸衍
生物的方法,其
化学式为(I):其中X1是卤素原子,X2是卤素原子,Q是
化学式为-
CH2-或-( )2-的基团,Y是较低的烷基基团,或其药学上可接受的盐,该衍
生物对α4整合素介导的细胞粘附具有出色的抑制作用,并提供了该方法中有用的中间体。