Is the tungsten(IV) complex (NEt<sub>4</sub>)<sub>2</sub>[WO(mnt)<sub>2</sub>] a functional analogue of acetylene hydratase?
作者:Matthias Schreyer、Lukas Hintermann
DOI:10.3762/bjoc.13.230
日期:——
hypothesis, the regioselectivity of tungsten-catalyzed alkyne hydration of a terminal, higher alkyne had to be determined. However, complex 1 was not a competent catalyst for the hydration of 1-octyne under the conditions tested. Furthermore, we could not observe the earlier reported hydration activity of complex 1 towards acetylene. A critical assessment of, and a possible explanation for the earlier reported
提出了钨(IV)配合物(Et 4 N)2 [W(O)(mnt)2](1; mnt =顺丁烯二硫代马来酸三亚锡)(Sarkar等,J.Am.Chem.Soc.1997,119,4315)。是乙炔假单胞菌乙炔水合酶的活性中心的功能类似物,该酶将乙炔(乙炔; 2)水合为乙醛(乙醛; 3)。在没有令人满意的水合反应机理建议的情况下,我们考虑了金属-亚乙烯基型活化模式的可能性,因为对于具有反马尔可夫尼科夫区域选择性的钌基炔烃水合催化剂已经很好地确立了该模式。为了验证该假设,必须确定钨催化的炔烃末端水合的区域选择性。但是,在测试条件下,配合物1并不是1-辛炔水合的有效催化剂。此外,我们无法观察到较早报道的配合物1对乙炔的水合活性。提供了对早期报告结果的关键评估,并可能提供了解释。标题问题的答案为“否”。