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. ... The application of highly stereoselective aldol condensations to the synthesis of β-lactam antibiotics. ... Stereoselective aldol condensations of fully protected glycine and 3-butyryl thiazolidine-2-thiones with achiral aldehydes afforded β-hydroxyesters suitable for ...