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:
Jun. 10, 2008
Filed:
Mar. 31, 2003
Laszlo Czollner, Ebenfurth, AT;
Beate Kälz, Steinbrunn, AT;
Jan Rothenburger, Oslip, AT;
Stefan Welzig, Vienna, AT;
Laszlo Czollner, Ebenfurth, AT;
Beate Kälz, Steinbrunn, AT;
Jan Rothenburger, Oslip, AT;
Stefan Welzig, Vienna, AT;
Sanochemia Pharmazeutika AG, Wien, AT;
Abstract
The invention relates to a method for producing an addition salt of 2,4'-dimethyl-3-piperidino-propiophenone (tolperisone) with a pharmaceutically acceptable acid, of formula (I). According to the invention, 4-methylpropiophenone is reacted with piperidine hydrochloride and 1,2-dioxolane in the presence of an acid serving as a catalyst, and the tolperisone obtained in the form of an acid addition salt is separated by filtering after the reaction mixture has cooled down