Cysteic acid – Knowledge and References

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Reactions With Disinfectants

Published in Richard A. Larson, Eric J. Weber, Reaction Mechanisms in Environmental Organic Chemistry, 2018

Thiols were oxidized by HOCl to the corresponding sulfonic acids; thus, cysteine afforded cysteic acid (Equation 5.6: Ingols et al., 1953). This is in contrast to the behavior of NH2Cl, which oxidized cysteine only to the disulfide. Thiophenes were chlorinated in the nucleus as well as undergoing partial oxidation of the sulfur atom (Equation 5.7: Morton, 1946), whereas more highly condensed sulfur heterocycles such as benzo[b] thiophene (1) and dibenzothiophene (2) were oxidized to the sulfone and sulfoxide almost to the exclusion of chlorination (Lin and Carlson, 1984). Tetrachlorothiophene (3), 3–formyl–2,4,5–trichlorothiophene (4), and 3–acetyl–2,4,5– trichlorothiophene (5) were identified in a spent liquor from the bleaching of a softwood kraft pulp (McKague et al., 1989); the precursors of these chemicals were not conjectured upon. () ()

Studies on the interaction of aquacobalamin with cysteinesulfinic and cysteic acids, hypotaurine and taurine

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Journal Information

Published in Journal of Coordination Chemistry, 2018

Ilia A. Dereven’kov, Lubov V. Tsaba, Elizaveta A. Pokrovskaya, Sergei V. Makarov

The mechanism of the reaction is shown in Scheme 2. It includes two equilibria: (i) between aqua- and hydroxo-species of Cbl(III) and (ii) between –NH3+ and –NH2 species of cysteic acid and taurine. The formation of complex is only possible in the course of interaction between H2OCbl+ and –NH2 species of cysteic acid and taurine.