Analytical Method Validation and Quantitative Analysis for Active Pharmaceutical Ingredient and Marketed Formulation of Teneligliptin Hydrobromide by UV Spectroscopy

A Dipeptidyl peptidase-4 inhibitor teneligliptin hydrobromide is used for lowering blood glucose levels in people with diabetes mellitus. A very straight forward, quick, responsive and accurate UV- Spectrophotometric method of analysis have been developed for assessment of Teneligliptin Hydrobromide in pharmaceutical formulation. Since teneligliptin hydrobromide only absorbs UV in the low wavelength area, it cannot be identify with high sensitivity. Teneligliptin Hydrobromide has shown successful results for various analytical instruments only in the permutation of Taurine and Sodium periodate. The API was derivatives using Taurine and Sodium periodate in water and methanol. Drug exhibited distinct λmax in methanol at 281nm. Linearity was observed in the concentration range 10-80 μg/ml. The method was validated by recovery studies. The methods used are inexpensive and sensitive for the inference of teneligliptin hydrobromide in bulk drug and tablet dosage forms.

Efficient conjugation of anti-HBsAg antibody to modified core-shell magnetic nanoparticles (Fe3O4@SiO2/NH2)

Introduction: Further development of magnetic-based detection techniques could be of significant use in increasing the sensitivity of detection and quantification of hepatitis B virus (HBV) infection. The present work addresses the fabrication and characterization of a new bio-nano composite based on the immobilization of goat anti-HBsAg antibody on modified core-shell magnetic nanoparticles (NPs) by (3-aminopropyl) triethoxysilane (APTES), named Fe3O4@SiO2/NH2, and magnetic NPs modified by chitosan (Fe3O4@CS). Methods: At the first step, Fe3O4 was modified with the silica and APTES (Fe3O4@SiO2/NH2) and chitosan (Fe3O4@CS) separately. The goat anti-HBsAg antibody was activated by two different protocols: Sodium periodate and EDC-NHS. Then the resulted composites were conjugated with activated goat anti-HBsAg IgG. An external magnet collected Bio-super magnetic NPs (BSMNPs) and the remained solution was analyzed by the Bradford method to check the amount of attached antibody to the surface of BSMNPs. Results: The findings indicated that activation of antibodies by sodium periodate method 15-17 µg antibody immobilized on 1 mg of super magnetic nanoparticles (SMNPs). However, in the EDC-NHS method, 8-10 µg of antibody was conjugated with 1 mg of SMNPs. The resulting bio-magnetic NPs were applied for interaction with the HBsAg target using enzyme-linked immunosorbent assay (ELISA). About 1 µg antigen attached to 1 mg SMNPs, which demonstrated that the fabricated materials are applicable in the detection scope of HBsAg. Conclusion: In the present study, we developed new antibody-conjugated magnetic NPs for the detection of HBsAg using an efficient conjugation strategy. The results demonstrated that the binding capacity of Fe3O4@SiO2/NH2 was comparable with commercially available products. Our designed method for conjugating anti-HBsAg antibody to a magnetic nanoparticle opens the way to produce a high capacity of magnetic NPs.

Ruthenium-Catalyzed Oxidative Dearomatization of N-Boc Indoles

Ruthenium-catalyzed oxidative dearomatization of N-Boc indoles for the synthesis of indolin-3-ones is described. The N-Boc indoles can be transformed into indolin-3-ones in acetonitrile, using RuCl­3·3H2O as catalyst and sodium periodate (1.5 equiv) as oxidant. Further, a possible mechanism has been proposed on the basis of control experiments.