<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The aim of this work is the study of stability and kinetics of hydrolysis of the chosen compounds, derivatives of 2-hydroxy-3-[2-(4-methoxyphenyl)ethylamino]propyl-4- [(alkoxycarbonyl)amino]benzoates and 2-hydroxy-3-[2-(2-methoxyphenyl)ethylamino] propyl-4-[(alkoxycarbonyl)amino]benzoates with potential ultra-short beta-adrenolytic activity. The studied compounds are different in the position of the substituent on the benzene ring in the side chain as well as in the aromatic ring in position 4 with alkyl- (methyl- to butyl-) carbamate. Thin layer chromatography and UV-area spectrophotometry are used in order to establish the stability of these potential pharmaceuticals. The stability studies of the compounds were examined in acidic and alkaline media, in buffers and due oxidation at room and at elevated temperature chromatographically, and <italic>Rf </italic>values of incipient products and degradation products were detected. Kinetics of acid and base hydrolysis in various solutions at temperatures 80 °C and 100 °C were examined through UV-area spectrophotometry. Kinetic parameters such as rate constant <italic>k</italic>, half-life period <italic>t1/2 </italic>and usable life <italic>t90 </italic>were determined.</p></abstract>

The aim of this work is the study of stability and kinetics of hydrolysis of the chosen compounds, derivatives of 2-hydroxy-3-[2-(4-methoxyphenyl)ethylamino]propyl-4- [(alkoxycarbonyl)amino]benzoates and 2-hydroxy-3-[2-(2-methoxyphenyl)ethylamino] propyl-4-[(alkoxycarbonyl)amino]benzoates with potential ultra-short beta-adrenolytic activity. The studied compounds are different in the position of the substituent on the benzene ring in the side chain as well as in the aromatic ring in position 4 with alkyl- (methyl- to butyl-) carbamate. Thin layer chromatography and UV-area spectrophotometry are used in order to establish the stability of these potential pharmaceuticals. The stability studies of the compounds were examined in acidic and alkaline media, in buffers and due oxidation at room and at elevated temperature chromatographically, and Rf values of incipient products and degradation products were detected. Kinetics of acid and base hydrolysis in various solutions at temperatures 80 °C and 100 °C were examined through UV-area spectrophotometry. Kinetic parameters such as rate constant k, half-life period t1/2 and usable life t90 were determined.

Evaluation of Stability of Potential Betaadrenolytics in Various Solutions by thin Layer Chromatography and by Kinetics of Hydrolysis

Comenius University in Bratislava, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Odbojárov 10, 832 32 Bratislava, Slovak Republic

Comenius University in Bratislava, Faculty of Pharmacy, Department of Pharmaceutical Chemistry

University of Veterinary and Pharmaceutical Sciences Brno, Faculty of Pharmacy, Institute of Chemical Drugs

European Pharmaceutical Journal

The aim of this work is the study of stability and kinetics of hydrolysis of the chosen compounds, derivatives of...

Evaluation of Stability of Potential Betaadrenolytics in Various Solutions by thin Layer Chromatography and by Kinetics of Hydrolysis

Published Online: Dec 28, 2012

Page range: 54 - 62

DOI: https://doi.org/10.2478/v10219-012-0025-5

This content is open access.