Efficient N-heterocyclic carbene nickel pincer complexes catalyzed cross coupling of benzylic ammonium salts with boronic acids
作者:Xi-Yu Liu、Hai-Bo Zhu、Ya-Jing Shen、Jian Jiang、Tao Tu
DOI:10.1016/j.cclet.2016.09.006
日期:2017.2
Abstract Pyridine-bridgedbis-benzimidazolylidene nickel complexes exhibited very high catalytic activity toward cross coupling of inactive (hetero)aryl benzylic ammonium salts with (hetero)aryl and alkenyl boronic acids under mild reaction conditions. Even at 2 mol% catalyst loading, a wide range of substrates for both coupling partners with different steric and electronic properties were well tolerated
Friedel-Crafts Benzylation of Activated and Deactivated Arenes
作者:Gabriel Schäfer、Jeffrey W. Bode
DOI:10.1002/anie.201105380
日期:2011.11.11
going back makes possible facile Friedel–Craftsbenzylations with moderate reaction temperatures, simple reaction workups, and improved substrate scope for the formation of synthetically important diarylmethanes (see scheme). Upon complexation with BF3⋅OEt2, hydroxamates serve as reversible leaving groups that stabilize highly reactive carbocations. Even deactivatedarenes and electron‐deficient benzylhydroxamates
Gold(I)-catalyzed Benzylation of (Hetero)aryl Boronic Acids with (Hetero)benzyl Bromides by the Strategy of a S<sub>N</sub>2-type Reaction
作者:Wenqing Zang、Yin Wei、Min Shi
DOI:10.1002/asia.201800923
日期:2018.10.4
gold‐catalyzed benzylation of (hetero)aryl boronic acids with (hetero)benzylbromides to give the corresponding cross‐coupling products in moderate to good yields is reported. The reaction proceeds through a possible intermolecular SN2‐type reaction pathway to give a wide variety of di(hetero)arylmethanes as the desired products. An intriguing reaction mechanism has been proposed on the basis of control experiments
在此,报道了第一个用(杂)苄基溴对(杂)芳基硼酸进行金催化的苄基化反应,以得到中等至良好收率的相应交叉偶联产物的实例。反应通过可能的分子间S N 2型反应路径进行,从而得到各种所需的二(杂)芳基甲烷。在控制实验,31 P-NMR光谱检测和DFT计算的基础上,提出了一种有趣的反应机理。
THE NITROMETHANE INITIATOR OF THE FRIEDEL-CRAFTS NAPHTHALENE REACTION USING MICROWAVES
作者:G. Brãtulescu、Y. Le Bigot、M. Delmas
DOI:10.1081/scc-100106041
日期:2001.1
The alkylation of naphthalene using halogen derivatives may be achieved under very simple conditions by the Friedel–Craftsreaction. The products are obtained by irradiation of the paste containing the reaction mixture and a small quantity of nitromethane to initiate the reaction.