Asymmetric Synthesis ofα,γ-Substitutedγ-Sultones via Allylation of Chiral Lithiated Sulfonates
作者:Dieter Enders、Wacharee Harnying、Nicola Vignola
DOI:10.1002/ejoc.200300342
日期:2003.10
The first auxiliary controlled asymmetricsynthesis of enantiopure α,γ-substituted γ-sultones via α-allylation of lithiatedsulfonates by using 1,2:5,6-di-O-isopropylidene-α-D-allofuranose as chiral auxiliary is described. The high asymmetric inductions of the α-allylations were reached in good to excellent yields. Successive epimerization-free cleavage of the auxiliary and diastereoselective ring