PROCESS FOR THE PREPARATION OF DABIGATRAN ETEXILATE OR PHARMACEUTICALLY ACCEPTABLE SALT THEREOF

摘要

The present invention provides hydrobromide salt of dabigatran etexilate of formula (IV) and its process for the preparation. The present invention further provides crystalline Form I and crystalline Form II of hydrobromide salt of dabigatran etexilate and processes for their preparation. The present invention further relates to a process for the preparation of pharmaceutically acceptable salts, including methanesulfonate salt, of dabigatran etexilate using hydrobromide salt of dabigatran etexilate of the present invention.