Electrochemical reduction of artemisinin: Chromatographic identification of bulk electrolysis products

  • Faraja Ombwayo Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028
  • Zahilis Mazzhichette Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028
  • Amos Mugweru Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028
Keywords: Cyclic voltammetry, dyhidroartemisinin, electrochemical reduction, bulk electrolysis, LC-MS

Abstract

Artemisinin is a naturally occurring sesquiterpene lactone with an endo-peroxide bond. This drug is used for treatment of many diseases including malaria. The reduction of this molecule on an electrode surface was carried out by cyclic voltammetry as well as amperometry. Cyclic voltammetry of artemisinin generated one prominent peak wave at -1.0 V and another, smaller one at -0.3 V vs Ag/AgCl reference electrode. The bulk electrolysis of artemisinin on a carbon electrode generated two other irreversible peak waves at around -0.7 and -0.1 V. The concentration of the products was dependent on the time of electrolysis. LC-MS was used to determine the bulk electrolysis products of artemisinin. Initially dihydroartemisinin was generated as the main reduction product. Other reduction products were formed after further reduction of dyhidroartemisinin.

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Published
06-05-2019
Section
Electrochemical Science