The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2020
Filed:
Jul. 23, 2018
Interquim, S.a., Sant Cugat del Vallès, ES;
Xavier Berzosa Rodríguez, Terrassa, ES;
Francisco Marquillas Olondriz, Barcelona, ES;
INTERQUIM, S.A., Sant Cugat del Vallès, ES;
Abstract
The invention relates to a process for the preparation of lifitegrast (I) comprising a) reacting benzofuran-6-carboxylic acid (II) with a non-chlorinated carboxyl activating agent; and b) reacting the activated compound obtained in step a) with compound (III) or a salt thereof to give lifitegrast. It also relates to a process for the purification of lifitegrast (I) by i) reacting lifitegrast with dicyclohexylamine to give the dicyclohexylamine salt of lifitegrast (Ia); ii) isolating the salt from the reaction medium; iii) converting the isolated salt into lifitegrast by treatment with an acid; and iv) isolating lifitegrast from the reaction medium. It also relates to the dicyclohexylamine salt of lifitegrast (Ia) and to a process for its preparation. (Formula I, III)