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. ... A convenient direct transformation of -nitrobenzyl 6-(1′-hydroxyethyl)-1-azabicyclo-(3.2.0)heptane -3,7-dione-2-carboxylate to -formimidoyl thienamycin utilizing the silylated derivative of -formimidoyl cysteamine is described. ... J. Am. Chem. Soc., 103 (1981), p. 6765 The stereochemical ...