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. 07, 2012
Filed:
Oct. 28, 2004
Stefano Turchetta, Rome, IT;
Pietro Massardo, Rome, IT;
Valentina Aromatario, Rome, IT;
Chemi S.p.A., Cinisello Balsamo (MI), IT;
Abstract
Two novel crystalline forms, designated form A and form B of the antibacterial agent 1-cyclopropyl-7-(S,S)-2,8-diazabicyclo[4.3.0]non-8-yl)-6-fluoro-1,4-dihydro-8-methoxy -4-oxo-3-quinoline carboxylic acid hydrochloride of formula, the preparation thereof, and their pharmaceutical compositions are described. These crystalline forms, which are characterized by greater ability and ease of preparation and of formulation, can be produced by industrially applicable methods which comprises the steps of: a) suspending 1-cyclopropyl-7-(S,S)-2,8-diazabicyclo-[4.3.0]non-8-yl)-6-fluoro-1,4-dihydro -8-methoxy-4-oxo-3-quinoline carboxylic acid hydrochloride in a solvent selected from an alcohol and a polyalcohol, b) heating the mixture under reflux, c) cooling, d) isolating the product which is separated, (form A) and, additionally, e), reslurrying the solid at reflux in a solvent selected from alcohols and polyols or mixtures thereof, in which the resulting mixture has an overall water content of between 2.5% and 0.01% by weight, f) isolating the product (form B).