Hydration of Nitriles Catalyzed by Ruthenium Complexes: Role of Dihydrogen Bonding Interactions in Promoting Base-Free Catalysis
作者:Samanta Yadav、Rajeev Gupta
DOI:10.1021/acs.inorgchem.2c02058
日期:2022.10.3
Ru(II) complexes of amide-phosphine-based tridentate ligands additionally containing pyridine, isoquinoline, and quinoline rings have been synthesized, and their catalytic utility for the selective hydration of nitriles to amides is explored under the base-containing as well as base-free conditions. The chloride-ligated complexes 1–3 exhibited significant catalytic activity in the presence of a base
已经合成了另外含有吡啶、异喹啉和喹啉环的酰胺-膦基三齿配体的 Ru(II) 配合物,并在含碱和碱基下探索了它们在腈选择性水合为酰胺的催化效用。免费条件。氯化物配体1-3在碱存在下表现出显着的催化活性,而氢化物配体4-6在不需要任何碱的情况下进行腈的水合。机理研究揭示了[Ru-H]物种作为催化循环中的活性催化剂的参与。[Ru-H] 物种通过 [Ru-H···H-OH] 二氢键相互作用帮助进入的水分子极化,因此有助于定位的水分子攻击与钌中心配位的腈. 底物结合研究和动力学实验进一步支持了该机制。多种含有吸电子和放电子基团的芳族腈类以及其他底物包括脂肪族腈类、碱敏腈类和一些生物相关的腈类都被用于选择性水合。