<i>fac</i>-Re(CO)<sub>3</sub><b>L</b> Complexes Containing Tridentate Monoanionic Ligands (<b>L</b><sup>-</sup>) with a Seldom-Studied Sulfonamido Group As One Terminal Ligating Group
作者:Anna Maria Christoforou、Frank R. Fronczek、Patricia A. Marzilli、Luigi G. Marzilli
DOI:10.1021/ic700594a
日期:2007.8.1
tridentate ligands are needed. New neutral fac-Re(CO)3L complexes were obtained by treating fac-[Re(CO)3(H2O)3]+ with unsymmetrical tridentate NNN donor ligands (LH) based primarily on a diethylenetriamine (dien) moiety with an aromatic group linked to a terminal nitrogen through a sulfonamide. LHs contain 2,4,6-trimethylbenzenesulfonyl (tmbSO2) and 5-(dimethylamino)naphthalene-1-sulfonyl (DNS) groups. X-ray
为了在具有fac-M(CO)3+核(M = Tc,Re)的放射性药物中实现净中性配位单元,需要面部配位的单阴离子三齿配体。通过使用主要基于带有芳香族基团的二亚乙基三胺(dien)部分的不对称三齿NNN供体配体(LH)处理fac- [Re(CO)3(H2O)3] +,获得了新的中性fac-Re(CO)3L配合物通过磺酰胺连接至末端氮。LH含有2,4,6-三甲基苯磺酰基(tmbSO2)和5-(二甲基氨基)萘-1-磺酰基(DNS)基团。X射线晶体学和NMR分析证实,在固体和溶液状态下,fac-Re(CO)3L络合物中的所有L-都以三齿形式结合,其中一个供体是来自去质子化磺酰胺基的氮。在放射性药物中另一个重要的基本特性是形状,而这又取决于环形起皱器。对于L- = tmbSO2-dien-,tmbSO2-N'-Medien-和tmbSO2-N,N-Me2dien-,两个螯合环具有不同的起皱手性,这在