Keywords Bromine source Oxidation Thiols Sulﬁdes External magnet Recyclable catalyst Introduction Oxidative coupling of thiols and oxidation of sulﬁdes are two fundamental transformations in organic chemistry because their products, namely disulﬁdes and sulfoxides, respectively, are two important classes of organic sulfur compounds for which their application as precursors or intermediates in organic synthesis are highly regarded among organic chemists [1, 2]. Besides synthetic applications, interest in disulﬁdes and sulfoxides has been ampliﬁed when it was revealed that they not only play a crucial role in the synthesis of natural products and valuable physiologically and pharmacologically active molecules but also exist as important integral and supplementary parts in many pharmaceutical and biological active molecules such as cystine, DTNB (Ellman’s reagent or 5,50-dithio-bis(2-nitroben- zoic acid), omeprazole and ﬁpronil [3–6]. These fascinating applications have recently stimulated organic chemists to apply more and more focus on new, clean and economic methodologies for the synthesis of disulﬁdes and sulfoxides. During recent years, a diverse range of reagents, catalysts and oxidants have been reported for the performance of these transformations . A series of tremendous properties such as being inexpensive and environmentally benign as well as producing water as 123 Synthesis
Research on Chemical Intermediates – Springer Journals
Published: Nov 9, 2016
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