PROCESS FOR THE PREPARATION OF FORMS OF OLANZAPINE AND SOLVATES OF OLANZAPINE AND USE THEREOF FOR THE PREPARATION OF ANHYDROUS FORMS OF OLANZAPINE

摘要

The invention relates to a process for the preparation of form 1 of olanzapine, crystallized from a solvent mixture which comprises 2-propanol, some pseudopolymorphic forms, namely solvates of olanzapine, a new polymorphic form A of olanzapine, and processes for the preparation thereof.