Tagged Hypervalent Iodine Reagents: A New Purification Concept Based on Ion Exchange through S<sub>N</sub>2 Substitution
作者:Eike Kunst、Florian Gallier、Gilles Dujardin、Mekhman S. Yusubov、Andreas Kirschning
DOI:10.1021/ol702319p
日期:2007.12.1
The preparation of phenylsulfonate-tagged iodine(III) reagents as well as their use in a novel purification strategy for iodine(III)-promoted reactions is described. The concept is based on ion exchange and is initiated by an azide-promoted S(N)2-reaction at the alkyl sulfonate followed by trapping of the resulting aryl sulfonate anion with an ion-exchange resin. The concept is successfully proven for Ru-catalyzed oxidations of alcohols, the activation and glycosidation of thioglycosides, and the Suarez reaction of pyranoses.