Synthesis and Determination of Cerium(IV)-Reducing Antioxidant Capacity (CERAC) Assay of Some New Anthraquinones

Novel anthraquinone-based cyclic antioxidants containing amino, thio and oxo groups were synthesized and their antioxidant capacity was determined by using the cerium(IV)-reducing antioxidant capacity (CERAC) assay. ¹H, ¹³C NMR, FTIR-spectroscopy and ESI (Electrospray Ionization) mass spectrometry were used for the characterization of anthraquinone derivatives exhibiting CERAC antioxidant capacity. This study is of great importance, because the antioxidant capacity of anthraquinone compounds was analyzed for the first time by the CERAC method and CERAC-Trolox equivalent antioxidant capacity (TEAC) values were higher than that for Trolox. It should also be noted that, since all synthesized anthraquinone derivatives have the potential to find applications in terms of their biological properties due to their sulfur and nitrogen content, they will make an important contribution to the literature.