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:
Mar. 28, 2006
Filed:
Dec. 06, 2002
Kai-uwe Schöning, Windisch, CH;
Martin Studer, Basel, CH;
Hans Jürg Kirner, Pratteln, CH;
Stephan Burkhardt, Gelterkinden, CH;
Kai-Uwe Schöning, Windisch, CH;
Martin Studer, Basel, CH;
Hans Jürg Kirner, Pratteln, CH;
Stephan Burkhardt, Gelterkinden, CH;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The present invention relates to novel processes for the preparation of optically active 3-aminocarboxylic acids and their esters, in particular processes for the preparation of optically active compounds of the formula IA or IBas free bases or as acid addition salts thereof, in which the radicals are as defined in the description; in particular using the catalytic hydrogenation of olefinic precursors in the presence of platinum on alumina as a catalyst and the removal of chiral auxiliary groups from salt precursors; and novel process sections in the route for their synthesis, and processes for the preparation of biologically, in particular pharmacologically, active compounds, which comprise the novel processes.