Publication details
Electrochemical oxidation of fesoterodine and identification of its oxidation products using liquid chromatography and mass spectrometry
| Authors | |
|---|---|
| Year of publication | 2015 |
| Type | Article in Periodical |
| Magazine / Source | Electrochimica Acta |
| MU Faculty or unit | |
| Citation | |
| Doi | http://dx.doi.org/10.1016/j.electacta.2015.01.190 |
| Field | Electrochemistry |
| Keywords | Fesoterodine; Oxidation; Hydrolysis; Voltammetry; Mass spectrometry |
| Description | The electrochemical behavior of fesoterodine (FES), an antimuscarinic drug used for the treatment of urge incontinence and overactive bladder, was investigated using linear sweep and cyclic voltammetry at a stationary and rotating disc glassy carbon electrodes. A single two-electron anodic signal of FES was observed in neutral buffered aqueous methanolic solutions. Kinetics of alkaline hydrolysis of FES to its active metabolite 5-hydroxymethyl tolterodine was investigated by time dependent linear sweep voltammetry. Controlled potential electrolysis of FES solutions was performed at platinum gauze electrode in aqueous-methanolic media. Electrolyzed solutions were analyzed using ultra performance liquid chromatography with electrospray ionization quadrupole time-of-flight mass spectrometry. Two main products of electrochemical oxidation of fesoterodine were identified as 5-formyl fesoterodine (isobutyric acid 2-(3-diisopropylamino-1-phenyl-propyl)-4-formyl-phenyl ester) and N-desisopropylated fesoterodine (isobutyric acid 4-hydroxymethyl-2-(3-isopropylamino-1-phenyl-propyl)-phenyl ester). The mechanism of the electrochemical oxidation of FES has been proposed and confirmed using on-line electrochemistry/mass spectrometry with porous glassy carbon electrode. (C) 2015 Elsevier Ltd. All rights reserved. |