Electrophilic Selenium/Tellurium Reagents: Reactivity and their Contribution to Green Chemistry
Organic Selenium and Tellurium (2013)
Published Online: 17 JUN 2013
Copyright © 2009 John Wiley & Sons, Ltd. All rights reserved.
Patai's Chemistry of Functional Groups
How to Cite
Santi, C. and Tidei, C. 2013. Electrophilic Selenium/Tellurium Reagents: Reactivity and their Contribution to Green Chemistry. Patai's Chemistry of Functional Groups.
- Published Online: 17 JUN 2013
Selenium moieties are conveniently introduced into an organic molecule using electrophilic selenenylating reagents and the process is generally highly chemo-, regio and stereoselective requiring mild experimental conditions. In addition, organoselenium derivatives can be directly converted into a number of different functional groups and the organoselenium moiety can be employed for further stereoselective manipulation of the molecule. Several applications are described for the inter- and intramolecular carbon–oxygen, carbon–nitrogen and carbon–carbon bond formation as well as for the α-functionalization of carbonyl derivatives and the nucleophilic aromatic substitution reactions. More recently, the development of simple and efficient procedures for the preparation of chiral selenium reagents allowed their successful application in electrophilic asymmetric synthesis. Nowadays, probably the most recent aspect of this kind of chemistry is correlated with some new reactions that can be effected using organoselenium compounds as catalysts in renewable or alternative non-toxic media (water, glycerol, ionic liquids) bringing this kind of research in line with the concept of ‘Green and Sustainable Chemistry’. During the last half century, the application of tellurium reagents has undergone a notable improvement, overcoming the reluctance of several researchers mainly due to the characteristic persistent smell of many tellurium derivatives. In this chapter some general aspects of the chemistry promoted by electrophilic selenium and tellurium compounds are described exploiting also the differences between these two reagents.
- green chemistry;
- asymmetric synthesis;