An Investigation into the Formation of Impurity B during the Optimization of Naratriptan Hydrochloride
摘要:
During the process development of naratriptan hydrochloride we have made an unusual observation about the enhanced levels of intermediate 3 as an impurity (impurity B) in the final stage. Detailed investigation has led to the conclusion that impurity B is not only a carried over but also formed via acid catalyzed dehydration of yet another process related impurity. The present work details a report of the journey towards the development of an efficient process for the commercial production of naratriptan hydrochloride substantially free from the impurity B.
An Investigation into the Formation of Impurity B during the Optimization of Naratriptan Hydrochloride
作者:U. Sampath Kumar、V. Ravi Sankar、S. Bharani Kumar、M. Pandi Prabhu、S. Mahender Rao
DOI:10.1021/op800286f
日期:2009.5.15
During the process development of naratriptan hydrochloride we have made an unusual observation about the enhanced levels of intermediate 3 as an impurity (impurity B) in the final stage. Detailed investigation has led to the conclusion that impurity B is not only a carried over but also formed via acid catalyzed dehydration of yet another process related impurity. The present work details a report of the journey towards the development of an efficient process for the commercial production of naratriptan hydrochloride substantially free from the impurity B.