The present invention relates to a process for preparing lifitegrast or a salt thereof, wherein the process comprises hydrogenation of compound II in a mixture comprising at least one solvent selected from the group consisting of acetonitrile, a ketone solvent, an ester solvent and a mixture thereof, preferably acetonitrile.
本发明涉及一种制备利维拉斯特或其盐的工艺,其中该工艺包括化合物 II 在一种混合物中的氢化,该混合物包含至少一种溶剂,该溶剂选自由
乙腈、
酮类溶剂、
酯类溶剂及其混合物组成的组,优选
乙腈。