Dr. Reddy's Laboratories Limited
PROCESS FOR PREPARATION OF ERIBULIN AND INTERMEDIATES THEREOF

Abstract:

The present application relate to crystalline azide compound of formula (II) which is used as an intermediate for the preparation of halichondrin B analogues such as eribulin or pharmaceutically acceptable salts thereof. The present application also covers purification process of azide compound of formula (II) and its further conversion to eribulin or a pharmaceutically acceptable salts thereof.