Application of Continuous Flow Micromixing Reactor Technology for Synthesis of Benzimidazole Drugs

Synthesis of pharmaceutically active compounds by employing continuous flow micromixing reactor technology is an interesting research area. In this article we describe the synthesis of benzimidazole core drugs, 

such as lansoprazole (1a), pantaprazole (1b), and rabeprazole (1c) by using a continuous flow micromixing reactor technology. A key feature of the sulfoxidation includes the decreasing the reaction time from 3 h to ∼1 s to minimize the formation of sulfone impurities and improve the yields.

http://pubs.acs.org/doi/abs/10.1021/op300325f?journalCode=oprdfk

Gunupati Sharathchandra Reddy , Narra Santosh Reddy , Kushal Manudhane , Medisetti Venkata Rama Krishna , Kopparapu Janardana Sarma Ramachandra , and Srinivas Gangula *

Center of Excellence in Process Engineering, Research and Development, Integrated Product Development, Dr. Reddy’s Laboratories Ltd., Survey Nos. 42, 45, 46, and 54, Bachupally, Qutubullapur, Ranga Reddy District 500072, Andhra Pradesh, India

Org. Process Res. Dev., 2013, 17 (10), pp 1272–1276

DOI: 10.1021/op300325f

http://pubs.acs.org/doi/abs/10.1021/op300325f?journalCode=oprdfk