Enantioselective Haloetherification by Asymmetric Opening of <i>meso</i>-Halonium Ions
作者:Ulrich Hennecke、Christian H. Müller、Roland Fröhlich
DOI:10.1021/ol1028805
日期:2011.3.4
A new approach to enantioselective haloetherification reactions via desymmetrization of in situ-generated meso-halonium ions is described. The combination of N-haloamides as a halogen source and sodium salts of chiral phosphoric acids as catalysts can be used for the cyclization of symmetrical ene-diol substrates, yielding the haloetherification products under practical conditions in enantioenriched form.