Convenient Synthesis, Characterization and GPx-Like Catalytic Activity of Novel Ebselen Derivatives
作者:Sanjio S. Zade、Snigdha Panda、Santosh K. Tripathi、Harkesh B. Singh、Gotthelf Wolmershäuser
DOI:10.1002/ejoc.200400326
日期:2004.9
The synthesis and characterization of benzisochalcogenazolones (ebselenderivatives 16−21) is described. The synthesis of 16−21 was achieved by treating the bromo precursors 11−13 with an appropriate dilithium dichalcogenide. The synthesis of benzisoselenazolones 16 and 18 was also accomplished by an alternative route, that is, by treating the corresponding methoxymethyl selenides 22 and 23 with 1
Abstract A wide range of diselenides as precursors for selenium electrophiles is already known, but the development of reagents with higher selectivity is still ongoing. Herein we report the first synthesis of selenium-stabilized diselenides together with some preliminary reactions of these reagents in stereoselective selenenylation reactions.
[reaction: see text]. Polymer-bound chiral electrophilic selenium reagents have been developed and applied to stereoselective selenenylation reactions of various alkenes. Different cleavage protocols allow further functionalization of the addition products leading to improvements in selenium-based solid-phase chemistry.
Synthesis of Chiral Acetals by Asymmetric Selenenylations
作者:Lars Uehlin、Thomas Wirth
DOI:10.1080/10426500902930167
日期:2009.6.23
Asymmetric selenenylations of (E)-ethoxystyrene are described leading to chiralacetals. An efficient synthesis of such compounds including the determination of their absolute configuration is described.