Oxidation of 1-thioaroylsemicarbazides by bromine or hydrogen peroxide yields bis(C-aryl-N-ureido)formimidoyl disulphides. As a novel class of the generally labile di-imidoyl disulphides, such products display unusual stability; however, upon acylation, methylation, and acid or alkaline hydrolysis they are cleaved at their disulphide bond, to give the same products as their thioaroyl precursors.
F. Kurzer and K. M. Doyle, J. Chem. Soc., Perkin Trans. 1, 1986, 1873 DOI: 10.1039/P19860001873
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