The present invention provides a process for preparing a novel phenylalanine derivative of the formula (1): 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(1):其中X1为卤素原子,X2为卤素原子,Q为公式—
CH2—或—( )2—的基团,Y为低碳基团,或其药学上可接受的盐,对α4整合素介导的细胞黏附具有优异的抑制效果,以及在该过程中有用的中间体。