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. ... Synthesis of a new bridged diamine 3,6-diazabicyclo [3.2.0] heptane: Applications to the synthesis of quinolone antibacterials. ... Diprotected 3,6-diazabicyclo [3.2.0] heptane has been prepared by an highly efficient process. Selective deprotection, followed by condensation with 7- ...