Download 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 1-substituted 3-azetidinones, starting from readily accessible N-(alkylidene)- or N-(arylidene)-2,2,3-tribromopropylamines, is disclosed. ... Considerable research in this area has been done towards the synthesis of 1,3,3-trinitroazetidine 3 (TNAZ), an energetic ...