Synthesis and Investigations on the Oxidative Degradation of C3/C5-Alkyl-1,2,4-triarylpyrroles as Ligands for the Estrogen Receptor
作者:Anja Schäfer、Anja Wellner、Ronald Gust
DOI:10.1002/cmdc.201000537
日期:2011.5.2
In this study, we synthesized 1,2,4‐triarylpyrroles as ligands for the estrogen receptor (ER). Two pyrrole series were prepared with either C3‐alkyl or C3/C5‐dialkyl residues. Compounds from both series were susceptible to oxidative degradation—dialkylated compounds (t1/2=33–66 h) to a higher extent than their monoalkylated congeners (t1/2=140–211 h). Nevertheless, stability was sufficient for determination
在这项研究中,我们合成了1,2,4-三芳基吡咯作为雌激素受体(ER)的配体。制备了两个带有C3-烷基或C3 / C5-二烷基残基的吡咯系列。这两个系列的化合物都易于氧化降解,二烷基化化合物(t 1/2 = 33–66 h)的程度高于其单烷基化同类物(t 1/2 = 140–211 h)。然而,稳定性足以确定体外ER结合亲和力。在激素依赖性,ERα阳性的MCF-7 / 2a和U2-OS /α细胞中最活跃的激动剂是1,2,4-三(4-羟苯基)-3-丙基-1 H-吡咯(6 d) (MCF-7 / 2a:EC 50 = 70 n M ; U2-OS /α:EC 50 = 1.6 nM)。在U2-OS /β细胞中相应的无活性表现出较高的ERα选择性。在使用雌二醇(E2)以及纯化的hERα和hERβ蛋白的竞争实验中证实了这种趋势(计算6 d的相对结合亲和力(RBA):RBA(ERα)= 1.85%; RBA(ERβ)<0