Synthesis of Pyridines, Quinolines, and Pyrimidines via Acceptorless Dehydrogenative Coupling Catalyzed by a Simple Bidentate <i>P</i>^<i>N</i> Ligand Supported Ru Complex
作者:Rajarshi Mondal、David E. Herbert
DOI:10.1021/acs.organomet.0c00058
日期:2020.4.27
A ruthenium hydrido chloride complex (1) supported by a simple, heteroleptic bidentate P^N ligand (L1) containing a diarylphosphine and a benzannulated phenanthridine donor arm is reported. In the presence of base, complex 1 catalyzes multicomponent reactions using alcohol precursors to produce structurally diverse molecules including pyridines, quinolines, and pyrimidines via acceptorless dehydrogenative
据报道,钌氢化氯络合物(1)由简单的杂二齿双齿P ^ N配体(L1)支撑,该配体包含二芳基膦和苯甲酰菲啶供体。在碱的存在下,配合物1催化使用醇前体的多组分反应,从而通过无受体脱氢偶联途径产生结构多样的分子,包括吡啶,喹啉和嘧啶。值得注意的是,L1不容易带有能够进行这类转化的过渡金属催化剂所共有的(去)质子化的布朗斯台德酸性或碱性基团,表明金属-配体的协同作用在该催化剂的催化反应性中不发挥重要作用1。一个η的一个罕见的例子2的钌-醛加合物,分离和结构表征,及其在acceptorless脱氢偶合反应的作用进行了讨论。