Design, Synthesis, Evaluation, and Structure of Vitamin D Analogues with Furan Side Chains
作者:Ramón Fraga、Flavia Zacconi、Fredy Sussman、Paloma Ordóñez-Morán、Alberto Muñoz、Tiphaine Huet、Ferdinand Molnár、Dino Moras、Natacha Rochel、Miguel Maestro、Antonio Mouriño
DOI:10.1002/chem.201102695
日期:2012.1.9
tetrahydrofuran ring at the side chain that optimize the aliphatic side‐chain conformation through an entropy benefit. Following a similar strategy, four novel vitamin D analogues with aromatic furan side chains (3 a, 3 b, 4 a, 4 b) have now been developed. The triene system has been constructed by an efficient stereoselective intramolecular cyclization of an enol triflate (A‐ring precursor) followed
基于与1α,25-二羟基维生素D 3(1,25 D )结合的人类维生素D受体(hVDR)的晶体结构和超激动剂配体,我们先前设计了在侧链具有四氢呋喃环的新型超激动剂配体,从而优化了通过熵的好处实现脂肪族侧链构象。遵循类似的策略,四个具有芳香族呋喃侧链的新型维生素D类似物(3a,3b,4a,4b)现已开发。三烯体系的构建是通过对三氟甲磺酸酯(A环前体)进行高效的立体选择性分子内环化,然后将所得中间体与烯基硼酸酯(CD侧链,上部片段)进行铃木-宫浦偶联。呋喃侧链已通过金化学方法构建。这些类似物表现出显着的前分化作用和反式激活潜能。3 a的晶体结构与hVDR的配体结合结构域形成复合物,表明侧链呋喃环具有两个构象。