Triazoles. Part XI. Synthesis of 1,2,4-triazole-3-sulphonic acids by oxidation of 1,2,4-triazoline-3-thiones
作者:A. J. Blackman、J. B. Polya
DOI:10.1039/j39700002403
日期:——
free from the tautomeric thiols. Oxidation with chlorine or bromine usually affords unstable sulphonyl halides which are readily converted into sulphonamides or, with some exceptions, into sulphonic acids. However, oxidative cleavage of the C–S bond with the formation of 3-unsubstituted or 3-halogenotriazoles occurs with some 2- or 4-substituted 1,2,4-triazoline-3-thiones, especially with bromine as
1,2,4-三唑啉-3-硫酮似乎几乎不含互变异构硫醇。用氯或溴氧化通常会产生不稳定的磺酰卤,这些磺酰卤很容易转化为磺酰胺,或者除某些例外外,还转化为磺酸。但是,在某些2-或4-取代的1,2,4-三唑啉-3-硫酮,特别是溴作为氧化剂的情况下,CS键的氧化裂解会形成3-未取代或3-卤代三唑。