Abstract The Friedel-Craft condensation between benzalazines and aromatichydrocarbons provide a convenient method for the preparation of unsymmetrical diaryl methanes.
Bisulfate Salt-Catalyzed Friedel–Crafts Benzylation of Arenes with Benzylic Alcohols
作者:Ren-Jin Tang、Thierry Milcent、Benoit Crousse
DOI:10.1021/acs.joc.8b02361
日期:2018.11.16
We report here a method of direct Friedel–Craftsbenzylation of arenes with benzylic alcohols using cheap and readily available bisulfate salt as the catalyst in hexafluoroisopropanol. The catalytic system is powerful with a quite diverse group of functionalized arenes and benzylic alcohols. These mild conditions provide a straightforward synthesis of a variety of unsymmetrical diarylmethanes in high
Friedel-Crafts Benzylation of Arenes over Mixed Oxides
作者:Sujit R. Jadhav、Manohar R. Sawant
DOI:10.1002/jccs.200400021
日期:2004.2
The replacement of liquid acid catalyst by solid acids for the Friedel-Crafts reaction of aromatic alkylation is a challenging task. Mixed oxide possessing spinel structures were found to catalyze the Friedel-Craftbenzylation of arenes. It was found that the reaction was very fast at 80 °C, hence the reaction was studied with respect to more substrate. The significant point was even at this temperature
用固体酸代替液体酸催化剂用于芳族烷基化的傅克反应是一项具有挑战性的任务。发现具有尖晶石结构的混合氧化物催化芳烃的傅-克苄基化。发现反应在 80 °C 时非常快,因此研究了更多底物的反应。重要的一点是即使在该温度下也实现了以对位异构体为主的单苄基化。采用共沉淀法制备混合氧化物,并采用XRD技术对其进行表征。
Green, Mild, and Efficient Friedel–Crafts Benzylation of Scarcely Reactive Arenes and Heteroarenes under On‐Water Conditions
作者:Pellegrino La Manna、Annunziata Soriente、Margherita De Rosa、Antonio Buonerba、Carmen Talotta、Carmine Gaeta、Placido Neri
DOI:10.1002/cssc.201900137
日期:2019.4.23
The catalytic strategy exploits the hydrophobicity of the resorcinarene macrocycle 1 a. The proposed mechanism is based on the activation of benzylchloride by H‐bonding interactions with catalyst 1 a. In fact, under on‐water conditions the hydrophobic amplification of the strength of the H‐bonding interactions between the OH groups of the resorcinarene catalyst and the chlorine atom of benzyl chloride
A highly efficient catalyst for Suzuki–Miyaura coupling reaction of benzyl chloride under mild conditions
作者:Zhenhong Guan、Buyi Li、Guoliang Hai、Xinjia Yang、Tao Li、Bien Tan
DOI:10.1039/c4ra06551d
日期:——
organic synthesis, are usually synthesized through the traditional electrophilic substitution reaction i.e., Friedel–Crafts reaction, which suffers from the rearrangement and weak reactivity of aromatic compounds with deactivating/electron-withdrawing groups. The Suzuki–Miyauracouplingreaction of low-cost benzyl chloride as an alternative method overcomes these defects. Pd(II) organometallic catalysts
二芳基甲烷衍生物是有机合成中必不可少的组成部分,通常是通过传统的亲电取代反应(即Friedel-Crafts反应)合成的,该反应会遭受芳族化合物与失活/吸电子基团的重排和弱反应性的影响。低成本苄氯的Suzuki-Miyaura偶联反应作为一种替代方法克服了这些缺陷。加入Pd(II固定在三苯基膦-官能化微孔针织芳基聚合物)有机金属催化剂(KAPS(PH-PPH 3)-Pd)作为新型非均相催化剂用于苄基氯的Suzuki-Miyaura偶联反应中,并在温和条件下以76分钟-1(4569 h -1)的周转频率(TOF)表现出优异的催化活性。这项工作表明,催化剂的微孔结构可以迅速吸附底物,从而促进它们之间的相互作用,并最终提高催化效率。