Oxidative Addition of Aryl Electrophiles to a Prototypical Nickel(0) Complex: Mechanism and Structure/Reactivity Relationships
作者:Sonia Bajo、Gillian Laidlaw、Alan R. Kennedy、Stephen Sproules、David J. Nelson
DOI:10.1021/acs.organomet.7b00208
日期:2017.4.24
Detailed kinetic studies of the reaction of a model Ni0 complex with a range of aryl electrophiles have been conducted. The reactions proceed via a fast ligand exchange pre-equilibrium, followed by oxidativeaddition to produce either [NiIX(dppf)] (and biaryl) or [NiII(Ar)X(dppf)]; the ortho substituent of the aryl halide determines selectivity between these possibilities. A reactivity scale is presented
已经对模型 Ni0 络合物与一系列芳基亲电子试剂的反应进行了详细的动力学研究。反应通过快速配体交换预平衡进行,然后氧化加成生成 [NiIX(dppf)](和联芳基)或 [NiII(Ar)X(dppf)];芳基卤化物的邻位取代基决定了这些可能性之间的选择性。提出了一个反应性等级,其中一系列底物按照它们经历氧化添加的速率进行定量排序。氧化加成速率与原型交叉偶联反应中的转化率松散相关。在动力学实验中导致 NiI 产物的底物在催化条件下会产生更多的同源偶联产物。
Phenol Derivatives in Ruthenium-Catalyzed C-H Arylation: A General Synthetic Access to Azole-Based Congested Polyaromatics
作者:Julien Roger、Jean-Cyrille Hierso
DOI:10.1002/ejoc.201800312
日期:2018.9.23
Aryl triflates are suitable electrophile coupling partners for the ruthenium‐catalyzed direct diarylation of heteroaromatic substrates using azole N‐directed sp2 C–H activation including diethyl carbonate as an eco‐friendly solvent.
Metal nitrate promoted highly regiospecific <i>ortho</i>–nitration of phenols: Application to the synthesis of nitroxynil
作者:Zafar Iqbal、Asha Joshi、Saroj Ranjan De
DOI:10.1080/00397911.2023.2184270
日期:2023.4.18
Abstract Highly regiospecific ortho–nitration of electronically diverse phenols is accomplished using Fe(NO3)3.9H2O for electron–rich and Cu(NO3)2.6H2O for electron–deficient phenols as the cheap nitrating agents. The reaction is carried out in CH3CN at 90 °C under mild and neutral conditions where structurally diverse phenols afford exclusively ortho–nitration products in moderate to good yields with
摘要 使用 Fe(NO 3 ) 3 .9H 2 O 富电子酚和 Cu(NO 3 ) 2 .6H 2 O 缺电子酚作为廉价的硝化剂,实现电子多样性酚类的高度区域特异性邻位硝化。该反应在 CH 3 CN 中于 90 °C 在温和和中性的条件下进行,其中结构多样的酚类以中等到良好的收率专门提供邻硝化产物,并且具有出色的官能团耐受性。通过实现生物活性化合物硝苯腈,建立了该策略的合成应用。
The Acid-Catalyzed Alcoholysis of β-Naphthyl Esters
作者:Morton Harfenist、Richard Baltzly
DOI:10.1021/ja01194a059
日期:1947.2
Shobana, N.; Amirthavalli, M.; Deepa, V., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1988, vol. 27, # 1-12, p. 965 - 966
作者:Shobana, N.、Amirthavalli, M.、Deepa, V.、Shanmugam, P.