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 synthesis of an enantiomerically pure (5R, 6R)-carbapenem is described. The key step consists of a stereospecific CC-coupling in 4-position of the lactam by means of cuprates. ... Cookies are used by this site. To decline or learn more, visit our Cookies page.