Novel pendant-type macrocyclic bifunctional chelating agents: (carboxymethyl)amino derivatives of 2-(4-nitrobenzyl)-1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetic acid and their complex formation with yttrium(III)

Abstract

The authors investigated novel synthetic routes to pendant-type {rho}-NO{sub 2}-BZ-DOTA, 1 and 2, containing a (carboxymethyl) amino group appended to the DOTA structure via a methylene (1) and an ethylene (2) spacer, respectively. The complexation of Yttrium (III) with these chelates is reported. 1 fig., 1 tab.