Hydroxyl radical as a strong electrophilic species
In order to clarify an index which could be used as proof of the presence of hydroxyl radical, a new standard isomer distribution ratio of phenols formed from aromatic hydroxylation with [(4-bromophenyl)diazenyl](phenyl)methyl hydroperoxide 4, which is a stable source of hydroxyl radical, under a new appropriate photolysis condition in the presence or absence of benzoquinones is reported. We also demonstrated the strong electrophilic properties of hydroxyl radical in reference to earlier results of electron density calculations.
A New Epoxidation Reaction: Base-catalysed Stereospecific Epoxidation with α-Azohydroperoxides
A new stereospecific epoxidation with α-azohydroperoxides (1) in basic media is reported. cis- and trans-Stilbene gave the corresponding epoxides stereospecifically in the reaction with α-azohydroperoxides (1a-d) catalysed by pyridine or sodium hydroxide.
Tezuka, Takahiro,Iwaki, Masaaki
p. 2507 - 2509
(2007/10/02)
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