Targeting synthetic analogues of the metallo-sulfur active sites of nickel enzymes capable of important catalysis
作者:Matt C. Smith、J. Elaine Barclay、Sian C. Davies、David L. Hughes、David J. Evans
DOI:10.1039/b307175h
日期:——
The nickel containing enzymes NiFe-hydrogenase, carbon monoxide dehydrogenase and acetyl-CoA synthase are able to catalyse environmentally, and potentially industrially, important reactions: hydrogen uptake; carbondioxide/carbon monoxide interconversion; and incorporation of carbon monoxide to form acetyl-CoA, respectively. Progress toward the synthesis of nickel–iron complexes with structural features
含镍的酶NiFe氢化酶,一氧化碳脱氢酶和乙酰辅酶A合酶能够催化环境方面以及潜在的工业上重要的反应:氢的吸收;二氧化碳/一氧化碳相互转化;并结合一氧化碳以形成乙酰辅酶A。描述了具有与这些酶的活性位点相关的结构特征的镍铁配合物的合成进展,以及第一个甲基化镍铁双金属配合物[Fe(N S 3)(NO)-S } Ni(CH 3)(dppe)](N S 3 = N(CH 2 CH 2 S)3 3−),与乙酰辅酶A合酶机制中拟议的机制中间体有关。
Binuclear Complexes Containing a Methylnickel Moiety: Relevance to Organonickel Intermediates in Acetyl Coenzyme A Synthase Catalysis
作者:William G. Dougherty、Krishnan Rangan、Molly J. O’Hagan、Glenn P. A. Yap、Charles G. Riordan
DOI:10.1021/ja803795k
日期:2008.10.15
A series of binuclear NiNi complexes supported by a single thiolate bridge and containing a methylnickel moiety have been prepared and fully characterized. The complexes represent structural analogues for the proposed organonickel intermediate in the acetyl coenzyme A synthase catalyticcycle. Variable temperature 31P NMR spectroscopy was used to examine dynamic behavior of the thiolate bridging interaction
一系列由单个硫醇桥支撑并含有甲基镍部分的双核 NiNi 配合物已被制备和充分表征。这些复合物代表了乙酰辅酶 A 合酶催化循环中提议的有机镍中间体的结构类似物。使用变温 31P NMR 光谱来检查两种衍生物中硫醇盐桥接相互作用的动态行为。动力学分析、独立交换和交叉实验支持分子间交换机制。羰基化通过还原消除途径形成硫酯。