Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Norstatine and its analogs, ie, 3-amino-2-hydroxyalkanoic acids, with high enantiomeric purity are obtained through effecient asymmetric synthesis of 3-silyloxy-β-lactams by chiral enolate - imine cyclocondensation, followed by hydrolysis. ... Efficient asymmetric synthesis of ...