Novel iron(III) complexes with phenolate containing tripodal tetradentate ligands as model systems for catechol 1,2-dioxygenases
作者:Michael Merkel、Felizitas K Müller、Bernt Krebs
DOI:10.1016/s0020-1693(02)01082-4
日期:2002.9
are structural models for inhibitor substrate adducts of catechol 1,2-dioxygenases. All complexes were characterized by spectroscopic methods and X-ray structure analysis. The coordination sphere of all Fe(III) cores is distorted octahedral with the inhibitor substrate tbc occupying two cis positions whereas the ligand with its N2O2 donor set represents the endogenous protein ligands. The in situ prepared
摘要铁(III)配合物HNEt3 [Fe(L1)(tbc)]·0.5Me2CO·0.5Et2O(1),HNEt3 [Fe(L2)(tbc)]·0.25H2O(2)和HNEt3 [Fe(L3) (tbc)](3)包含新的三脚架四齿配体H2L1,H2L2和H2L3(H2L1:(3,5-二溴-2-羟基苄基)(2-羟基苄基)(2-吡啶基甲基)胺,H2L2:(3,5 -二氯-2-羟基苄基)(2-羟基苄基)(2-吡啶基甲基)胺,H2L3:(3,5-二氯-2-羟基苄基)(2-羟基-5-硝基苄基)(2-吡啶基甲基)胺,H2tbc:合成了四溴邻苯二酚)。它们是邻苯二酚1,2-二加氧酶抑制剂底物加合物的结构模型。通过光谱法和X射线结构分析对所有配合物进行表征。所有Fe(III)核的配位球都扭曲了八面体,抑制剂底物tbc占据了两个顺式位置,而带有N2O2供体的配体代表了内源性蛋白质配体。在不存在tbc的条件下,原位制备的铁(III)配合物显示了对3