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 enolates derived from 2-pyridylthioesters by reaction with BCl 3 ·SMe 2 and enantiomerically pure aminoalcohols react with aromatic imines in an enantioselective fashion (ee up to 78%) to afford β-lactams in a convenient one-pot procedure. ... The enolates derived from 2- ...