Compounds and Processes for preparing serine protease inhibitors

摘要

593214 Disclosed is a process of stabilizing the compound of Formula 4, comprising i) dissolving the compound of Formula 4 in an organic solvent to obtain a solution of the compound of Formula 4, ii) adding an acid to the solution of the compound of Formula 4, and iii) concentrating the solution of the compound of Formula 4 to obtain the compound in a solid form.