1201648-49-8Relevant articles and documents
NEW PROCESS FOR THE PREPARATION OF LEVOCETIRIZINE AND INTERMEDIATES THEREOF
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, (2010/01/07)
The present invention describes a novel process for the preparation of levocetirizine and pharmaceutically acceptable acid addition salts thereof via a ketocetirizine ester and new ketocetirizine ester intermediates used in that process. reaction of ketocetirizine of the formula (IIIb) to a ketocetirizine ester of the formula (IV) or a salt thereof.