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- W2000834299 abstract "Catalytic cyclohexene epoxidation with iodosylbenzene by the following Mn-porphyrins bearing ortho substituents on a meso group: MnTTP, MnM2-OHPTTP(5-(2-hydroxyphenyl)-10,15,20-tritolylporphyrin) and MnM2-BrPTTP(5-(2-(3-bromo-1-propoxy)phenyl)-10,15,20-tritolylporphyrin), has been studied. The effect of dioxygen and imidazole axial ligand on the yields of epoxide and allylic oxidation products, i.e. alcohol and ketone, was investigated. It was observed that the product selectivity is strongly dependent on the distribution of the Im/MnP species (M, MIm and MIm2 obtained by spectrophotometric titrations). For MnTPP at Im/MnP=1 the best epoxide yield associated with the maximum MIm concentration was observed. The presence of the OH substituent produced a remarkable effect on the reactivity and catalytic properties of the porphyrin system, i.e. drastic reduction in allylic oxidation, slight increase on the epoxide yield, a decrease on the formation of the MnP/Im complexes and change of the reactivity of the Mn center with PhIO. These results are discussed in terms of a possible electronic interaction of the oxygen ortho substituent and the porphyrin ring." @default.
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- W2000834299 date "2010-01-01" @default.
- W2000834299 modified "2023-10-17" @default.
- W2000834299 title "Thermal Stability of MnTE-2-PyPCl5, a Potent Catalytic Antioxidant and Cellular Redox Modulator" @default.
- W2000834299 doi "https://doi.org/10.1016/j.freeradbiomed.2010.10.626" @default.
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