Designed pincer ligand supported Co(<scp>ii</scp>)-based catalysts for dehydrogenative activation of alcohols: Studies on <i>N</i>-alkylation of amines, α-alkylation of ketones and synthesis of quinolines
作者:Anshu Singh、Ankur Maji、Mayank Joshi、Angshuman R. Choudhury、Kaushik Ghosh
DOI:10.1039/d0dt03748f
日期:——
Base-metal catalysts Co1, Co2 and Co3 were synthesized from designed pincer ligands L1, L2 and L3 having NNN donor atoms respectively. Co1, Co2 and Co3 were characterized by IR, UV–Vis. and ESI-MS spectroscopic studies. Single crystal X-ray diffraction studies were investigated to authenticate the molecular structures of Co1 and Co3. Catalysts Co1, Co2 and Co3 were utilized to study the dehydrogenative
贱金属催化剂Co1、Co2和Co3由分别具有NNN供体原子的设计的钳状配体L 1、L 2和L 3合成。Co1、Co2和Co3通过 IR、UV-Vis 进行表征。和 ESI-MS 光谱研究。研究了单晶 X 射线衍射研究以验证Co1和Co3的分子结构。催化剂Co1 , Co2和Co3用于研究醇的脱氢活化胺的N-烷基化、酮的 α-烷基化和喹啉的合成。在优化的反应条件下,开发了广泛的底物,包括醇类、苯胺类和酮类。对胺的N-烷基化、酮的 α-烷基化和喹啉合成的一系列控制实验进行了检查,以了解反应途径。研究了 ESI-MS 光谱研究以表征钴-醇盐和钴-氢化物中间体。研究了反应过程中放出的氢气对苯乙烯的还原,以验证催化剂的脱氢性质。为N提出了可能的反应途径-胺类烷基化、酮类α-烷基化和喹啉的合成基于对照实验和反应中间体的检测。