Nucleofugality hierarchy, in the aminolysis reaction of 4-cyanophenyl 4-nitrophenyl carbonate and thionocarbonate. Experimental and theoretical study
作者:Rodrigo Montecinos、Margarita E. Aliaga、Paulina Pavez、Patricio Cornejo、José G. Santos
DOI:10.1039/d0nj05837h
日期:——
Nucleophilic substitution reactions of the title compounds have been investigated with a series of secondary alicyclic amines in several solvents. The solvent, amine, and electrophilic group effects on kinetics, mechanism and nucleofugality hierarchy are discussed from experimental and theoretical studies. These studies show the mechanistic dependence on the solvent polarity; the theoretical results
已经在几种溶剂中用一系列脂环仲胺研究了标题化合物的亲核取代反应。从实验和理论研究中讨论了溶剂、胺和亲电子基团对动力学、机理和核疏散等级的影响。这些研究显示了对溶剂极性的机械依赖性;理论结果表明,反应中心(C O 和C S )的相对极化和离核剂的稳定性是控制产物分布的主要因素。
Dual Nickel Photocatalysis for <i>O</i>-Aryl Carbamate Synthesis from Carbon Dioxide
作者:Aleksi Sahari、Jukka Puumi、Jere K. Mannisto、Timo Repo
DOI:10.1021/acs.joc.3c00023
日期:2023.3.17
photocatalyst-mediated reduction of Ni(II) to Ni(I) and subsequent oxidative addition of the aryl halide. The physical properties of the photocatalyst were critical for promotingformation of O-aryl carbamates over various byproducts. Nine new phthalonitrile photocatalysts were synthesized, which exhibited properties that were vital to achieve high selectivity and activity.
interest. A simple, versatile, one-pot procedure for the synthesis of substituted O-aryl carbamates has been developed, and a protocol is henceforth described. N-Substituted carbamoyl chloride is formed in situ and subsequently reacted with a substituted phenol, avoiding the direct manipulation of sensitive reactants. This procedure offers an economical and efficient route to many compounds of interest