NOVEL CRYSTALLINE FORMS OF DESLORATADINE AND PROCESS FOR PREPARING THE SAME

摘要

The present invention provides novel crystalline polymorphic forms of desloratadine designated as Form (A) and Form (B), wherein said forms are characterized by different solid state techniques such as powder X-ray diffraction, differential scanning calorimetry, thermo gravimetric analysis and moisture content. Further, this invention discloses processes for preparation of said polymorphic forms. In addition, novel processes for preparing Form (I) and Form (II) of desloratadine and mixtures thereof are also disclosed.