Metal-Free Synthesis of Unsymmetrical Organoselenides and Selenoglycosides
作者:Yong Guan、Steven D. Townsend
DOI:10.1021/acs.orglett.7b02526
日期:2017.10.6
A one-pot, metal-free procedure has been developed to synthesize unsymmetrical organoselenides. In the first step of the reaction, arylation of potassium selenocyanate (KSeCN) with an iodonium reagent proceeds in the absence of a metal catalyst to produce an arylselenocyanate. In the second step, treatment with sodium borohydride unmasks a second selenium nucleophile that engages an aliphatic electrophile
Room-Temperature Pd-Catalyzed Synthesis of 1-(Hetero)aryl Selenoglycosides
作者:Mingxiang Zhu、Mouad Alami、Samir Messaoudi
DOI:10.1021/acs.orglett.0c02352
日期:2020.8.21
A general protocol for functionalization of an anomeric selonate anion at roomtemperature has been reported. By using the PdG3 XantPhos catalyst, the cross-coupling between the in situ-generated glycosyl selenolate and a broad range of (hetero)aryl and alkenyl iodides furnished a series of functionalized selenoglycosides in excellent yields with perfect control of the anomeric configuration.