New pseudopolymorph of desloratadine formed with carbon dioxide

摘要

The pseudopolymorph of desloratadine formed with carbon dioxide of the formula (I) has valuable anti-allergic effect and can be used as pharmaceutical active ingredient. The present invention also relates to the preparation of desloratadine of high purity. The present invention also relates to the use of the pseudopolymorph of desloratadine of the formula (I) for the preparation of salts of desloratadine of the formula (VI) (wherein X stands for an anion and n is 1 or 2).