Competition of various cis-Pt(II) diamines for the N1 and N7 sites of adenosine and 9-(β-D-ribofuranosyl)purine
作者:Jorma Arpalahti、Pertti Lehikoinen
DOI:10.1016/s0020-1693(00)80904-4
日期:1989.5
controlled reaction of the isolated 1:1 complexes with thioacetamide, which gives a correlation factor between the signal height of the complex observed by LC and the concentration of the complex. The quantified stock solutions of the complexes are then used to calibrate the reaction products of the nucleosides with Pt(II) separated by LC. With both nucleosides all Pt(II) compounds studied seem to slightly
摘要采用两种不同的方法测定几种水合的顺式-Pt(II)二胺化合物的N1与N7的结合比(二胺=(NH 3)2,(CH 3 NH 2)2,[(CH 3)2 NH] 2和四甲基乙二胺)与腺苷和9-(β-D-呋喃呋喃糖基)-嘌呤在pH 4下进行。第一种方法涉及通过LC分离核碱基C8上带有3 H标记的Pt核苷1:1配合物,随后进行LC闪烁检测器测定络合物。第二种方法采用了分离的1:1配合物与硫代乙酰胺的受控反应,该反应在LC观察到的配合物信号高度与配合物浓度之间提供了相关系数。然后将复合物的定量储备溶液用于校准核苷与通过LC分离的Pt(II)的反应产物。对于两个核苷,所有研究的Pt(II)化合物似乎都比N1位稍微偏爱N7位。即使在空间上受阻的Pt(II)二胺较少,腺苷的C6NH 2基团似乎也比与N7的配位更有效地防止N1结合。