Ruthenium organometallics of chloro-substituted 2′-hydroxychalcones – A story of catecholase biomimetics beyond copper
作者:Adnan Zahirović、Sunčica Roca、Aleksandar Višnjevac、Emira Kahrović
DOI:10.1016/j.jorganchem.2021.121863
日期:2021.7
2’-hydroxychalcones, differing in the position of the chloro substituent at chalcone moiety, were prepared by solution synthesis and characterized by chemical analysis, infrared and electron spectroscopy, mass spectrometry and 1D and 2D NMR spectroscopy, as biomimetic functional models of catechol oxidase. The molecular and crystal structures of three compounds were determined by single crystal X-ray diffraction
通过溶液合成制备了4种新的2'-羟基查耳酮有机钌(II)化合物,它们在查尔酮部分的氯取代基位置不同,并通过化学分析,红外和电子光谱,质谱以及1D和2D NMR光谱进行了表征,作为儿茶酚氧化酶的仿生功能模型。通过单晶X射线衍射确定三种化合物的分子和晶体结构。所述有机金属化合物是具有中性物质钢琴凳伪八面体几何形状与钌(II)由η协调6-Cymene,双齿二元2'-羟基查尔酮配体和氯离子。在三种温度下,在三种溶剂中,通过电子光谱研究了新型有机金属的儿茶酚酶活性。动力学测量准一级条件下进行v最大,ķ猫,ķ中号,TON,TOF和ē一个值来确定。化合物(1)–(4)具有溶剂依赖性儿茶酚酶活性,其活性随乙醇>甲醇≫乙腈的顺序降低。发现有机金属催化的反应的k cat值最高,活化能最低(4),在查尔酮配体的B环具有氯取代基的对位。297 K和307 K的10 4 h -1和10 5 h -1级的k ca