半胱氨酸在维持细胞氧化还原稳态中起着重要作用,半胱氨酸浓度的扰动与心血管疾病,肝脏疾病和癌症有关。19 F MRI由于其高的组织穿透力和可忽略的生物学背景信号,在生物学上是检测半胱氨酸的一种有前途的方法。在这里,我们报告氟化的大环铜配合物,其通过半胱氨酸还原Cu(II)配合物后显示19 F NMR / MRI开启响应。与半胱氨酸的反应性是通过在加入半胱氨酸后结合紫外可见光谱和EPR光谱仪监测强大的抗磁性19 F信号的出现来研究的。重要的是,与–CH 2 CF的配合物3个标签显示出良好的水溶性。在HeLa细胞中对该复合物进行的研究表明,这些探针可用于在复杂的生物环境中检测半胱氨酸。
The selective use of the tert-butoxycarbonyl protecting group has enabled efficient syntheses of the tri-linked cyclam derivatives (6)-(8). Using a related protecting group strategy, a series of related single-ring, N-benzylated cyclam derivatives (1)-(4) has also been prepared.
Macrocyclic ligand design. Interaction of a series of successively N-benzylated derivatives of 1,4,8,11-tetraazacyclotetradecane (cyclam) with copper(ii) and nickel(ii)
作者:Ying Dong、Geoffrey A. Lawrance、Leonard F. Lindoy、Peter Turner
DOI:10.1039/b211394e
日期:2003.4.4
series on the properties of the above complexes. The UV–VIS spectra obtained for each series of metal complexes indicate that the sequential introduction of N-benzyl substituents produces a change to lower ligand fields of the corresponding macrocyclic tetramines. Cyclic voltammograms of both the nickel(II) (low-spin) and copper(II) complexes both yield evidence for M(III)/M(II) as well as M(II)/M(I) couples
Metal ion recognition. Interaction of a series of successively N-benzylated derivatives of 1,4,8,11-tetraazacyclotetradecane (cyclam) with selected transition and post-transition metal ions
作者:Ying Dong、Sandra Farquhar、Karsten Gloe、Leonard F. Lindoy、Brendan R. Rumbel、Peter Turner、Kathrin Wichmann
DOI:10.1039/b300002h
日期:2003.4.4
lead(II) and silver(I) nitrates is reported; the results are compared with those obtained in a prior study involving the formation of the corresponding complexes of nickel(II) and copper(II) with this ligand series. The isolation of a selection of 1 ∶ 1 (metal ∶ ligand) complexes has been carried out and X-ray diffraction structures of five such products have been determined. In each complex the metal ion