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:
Aug. 16, 1983
Filed:
Jul. 13, 1981
Vincenzo Cannata, Borgo Nuovo Pontecchio Marconi, IT;
Graziano Zagnoni, Vergato, IT;
Alfa Farmaceutici S.p.A., Bologna, IT;
Abstract
A new process for the optical resolution of mixtures of d- and 1-2-(6-methoxy-2-naphthyl)-propionic acids, which comprises preparing a solution of a mixture of d-and 1-2-(6-methoxy-2-naphthyl)-propionic acids and an optically active organic base in a predetermined organic solvent, slowly cooling the obtained solution and seeding with crystals of a salt of d-2-(6-methoxy-2-naphthyl)-propionic acid with the optically active organic base containing a certain amount by weight of the organic solvent, and treating the obtained product with mineral acids in suitable organic solvents to obtain the free d-2-(6-methoxy-2-naphthyl)-propionic acid.