Isomer distribution ratios of phenols in aromatic hydroxylation with the hydroxyl radical generated from .alpha.-azohydroperoxide in anhydrous organic media. Comparison with Fenton's reagent
A novel base-catalysed oxidation of sulphides with an α-azohydroperoxide
作者:Takahiro Tezuka、Masaaki Iwaki、Yasuhiko Haga
DOI:10.1039/c39840000325
日期:——
The α-azohydroperoxide (1) in the presence of pyridine oxidises aryl sulphides cleanly to sulphoxides; the dioxirane (2) is proposed as the intermediate.
α-azohydroperoxide () (ca. 10−3 M) in benzene under reflux with bubbling inert gas for 20 – 23 hours affords biphenyls () in high yields (70 – 90%). A mechanism involving an induced decomposition radical chain reaction is suggested.
Activation of Molecular Oxygen into Hydrogen Peroxide via α-Azobenzyl Hydroperoxide. A Generation of Hydrogen Peroxide from Organic Hydroperoxide by the Amine-base Catalyzed Reaction
作者:Takahiro Tezuka、Takashi Otsuka
DOI:10.1246/cl.1988.1751
日期:1988.10.5
Hydrogenperoxide is generated together with nitrile imine from α-azobenzyl hydroperoxide, which is formed readily by autooxidation of arylaldehyde hydrazone, via peroxycarboximidic acid by the amine-base catalyzed reaction in benzene. This provides a new type of activation reaction of molecular oxygen into hydrogenperoxide by aldehyde hydrazone.