TITLE:
Hydrolytic Degradation Study of Lansoprazole, Identification, Isolation and Characterisation of Base Degradation Product
AUTHORS:
Satyanarayana Battu, Vasudev Pottabathini
KEYWORDS:
Lansoprazole, Hydrolytic Degradation, Isolation, Characterization, Preparative HPLC, 1H NMR, 13C NMR and 2 D NMR
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.6 No.2,
January
20,
2015
ABSTRACT: Lansoprazole degradation is accelerated in both acidic and basic medium in water. The present investigation deals with the hydrolytic degradation of Lansoprazole. Acidic medium degradation show all known impurities and degradation products whereas basic degradation studies show new impurity which has higher molecular weight than Lansoprazole. New impurity was identified, isolated using mass based auto purification system and characterised by 1H NMR, 13C NMR, HMBC, HSQC, NOE, COSY and HRMS experiments. Isolated impurity was showing molecular weight of 467.10, molecular formula of C23H16F3N5OS and its name is 7-(3-Methyl-4-(2,2,2-trifluoroethoxy) pyridin-2-yl)-7H-benzo[4,5]imidazo[2,1-b]benzo[4,5]imidazo[2,1-d][1,3,5]thiadiazine.