A comparative kinetic study of the rat-liver glutathione S-transferase catalysed dehalogenation of fluoro- and chloroaromatic compounds showed no significant decrease of the F/Cl mobility ratio on going from substrates that carry an ortho-nitro group to those which lack nitro groups near the reaction centre. This suggests a so far unrecognized activity of S-transferases in providing "solvation" for the leaving halide anion at the hydrophobic reaction centre. (C) 1998 Elsevier Science Ltd. All rights reserved.
CN115583889
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Biggi,G. et al., Journal of the Chemical Society. Perkin transactions II, 1972, p. 188 - 192
作者:Biggi,G. et al.
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Activated aromatic substitution by piperidine or [1-2H]piperidine in benzene. Dependence of kinetic deuterium isotope effect on the group displaced
作者:Francesco Pietra、Dario Vitali、Sergio Frediani
DOI:10.1039/j29680001595
日期:——
concentration in benzene. Both the extent of rate acceleration by piperidine and the value of the kinetic deuteriumisotopeeffect vary with the leaving group. When the leaving group is chloride, contrary to a previous report, the reactions are found to be only very mildly accelerated, and in a linear fashion, by piperidine. Moreover, substitution of deuteriated amine (90% deuteriated) for piperidine does not