Formation of chiral tertiary homoallylic alcohols via Evans aldol reaction or enzymatic resolution and their influence on the Sharpless asymmetric dihydroxylation
作者:Matthias Theurer、Peter Fischer、Angelika Baro、Giang Son Nguyen、Robert Kourist、Uwe Bornscheuer、Sabine Laschat
DOI:10.1016/j.tet.2010.03.048
日期:2010.5
Enantioenriched tertiary homoallylic alcohol derivatives (S)-2c and (S)-2a were obtained via Evans aldol methodology and enzymatic resolution of racemic tertiary acetate 2e, respectively. In order to study asymmetric 1,3-induction of the stereogenic center present in 2, congener (R)-2a as well as its O-protected derivatives (R)-2b–d were submitted to Sharpless asymmetric dihydroxylation to yield the