نتایج جستجو برای: hypervalent iodine
تعداد نتایج: 22019 فیلتر نتایج به سال:
A simple synthesis of a library novel C−N axially chiral iodoarenes is achieved in three-step from commercially available aniline derivatives. axial iodine reagents are rarely investigated the hypervalent arena. The potential as organocatalysts for stereoselective oxidative transformations assessed using well explored, but challenging α-oxytosylation ketones. All catalyse oxidation propiophenon...
We have developed the first example of hypervalent iodine(V)-catalyzed regioselective oxidation of phenols to o-quinones. Various phenols could be oxidized to the corresponding o-quinones in good to excellent yields using catalytic amounts of sodium salts of 2-iodobenzenesulfonic acids (pre-IBSes) and stoichiometric amounts of Oxone® as a co-oxidant under mild conditions. The reaction rate of I...
severe drawbacks, mainly their toxicity and the production of large amount of waste. In addition, sodium periodate is not effective in nonpolar solvents due to its insolubility, and it is also able to oxidize other functional groups such as alcohols, alkenes, aromatics, sulphides,.. whereas its reactions with ditertiary 25 glycols do not proceed. Several other oxidizing systems have been develo...
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