Successful preparation of metabolite of troglitazone by in-flow electrochemical reaction on coulometric electrode

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Abstract

A simple, rapid and efficient system utilizing a coulometric electrode was developed for the preparation of drug metabolites. Trace amounts of reactants are usually generated in electrochemical reactions, which are not suitable for the sufficient preparation of products to obtain NMR and other spectral data for chemical structure confirmation or to obtain data from pharmacological activity screening tests of products. In the developed system, called the "in-flow electrochemical reaction system," a drug, troglitazone, was dissolved in a volatile flow solvent, and pumped into a coulometric electrode under optimized conditions, and the effluent was evaporated. Without any further purification, milligram amounts of a pure oxidation product of troglitazone could be obtained within several hours. The amount obtained was enough for 1H- and 13C-NMR analysis by which the structure could be confirmed and was found to be identical to one of the metabolites of troglitazone detected in human plasma. This system will be useful to prepare standard compounds of the required amount for pharmacokinetic study and for toxicokinetic study. © 2007 Pharmaceutical Society of Japan.

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Tahara, K., Yano, Y., Kanagawa, K., Abe, Y., Yamada, J., Iijima, S., … Nishikawa, T. (2007). Successful preparation of metabolite of troglitazone by in-flow electrochemical reaction on coulometric electrode. Chemical and Pharmaceutical Bulletin, 55(8), 1207–1212. https://doi.org/10.1248/cpb.55.1207

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