A Biomimetic Approach to Oxidized Sites in the Xanthine Oxidoreductase Family: Synthesis and Stereochemistry of Tungsten(VI) Analogue Complexes
作者:Stanislav Groysman、Jun-Jieh Wang、Ranitendranath Tagore、Sonny C. Lee、R. H. Holm
DOI:10.1021/ja804000k
日期:2008.9.24
native metal molybdenum was employed in sulfido complexes to avoid autoreduction, and silylation models protonation. The complexes [MO 3(bdt)] (2-) and [MO 2(OSiR 3)(bdt)] (-) represent inactive sites, while [MO 2S(bdt)] (2-) and [MOS(OSiR 3)(bdt)] (-), with basal sulfido and silyloxo ligands, are the first analogues of the catalytic sites. Also prepared were [MOS 2(bdt)] (2-) and [MS 2(OSiR 3)(bdt)] (-)
两个系列的方锥 (SP) 单二硫烯配合物 [M (VI)O 3- n S n (bdt)] (2-) 及其硅烷化衍生物 [M (VI)O 2- n S n (OSiR 3)( bdt)] (-) ( n = 0, M = Mo or W; n = 1, 2, M = W),在本研究和以前的工作中合成,构成了氧化位点结构类似物的仿生方法中的基本分子在黄嘌呤氧化还原酶家族中。Benzene-1,2-dithiolate (bdt) 模拟基面中的天然吡喃蝶呤二硫烯螯合,在硫化配合物中使用钨代替天然金属钼以避免自动还原,并且甲硅烷基化模拟质子化。复合物 [MO 3(bdt)] (2-) 和 [MO 2(OSiR 3)(bdt)] (-) 代表非活性位点,而 [MO 2S(bdt)] (2-) 和 [MOS(OSiR 3) )(bdt)] (-),具有基础硫基和甲硅烷氧基配体,是催化位点的第一个类似物。还制备了