Coupling of arylboronic acids with benzyl halides or mesylates without adding transition metal catalysts
作者:Guojiao Wu、Shuai Xu、Yifan Deng、Chaoqiang Wu、Xia Zhao、Wenzhi Ji、Yan Zhang、Jianbo Wang
DOI:10.1016/j.tet.2016.10.031
日期:2016.12
We report herein a transition-metal-free coupling reaction of arylboronic acids with benzyl halides and mesylates for the construction of C(sp2)C(sp3) bonds. A unique feature of this coupling reaction is the formation regioisomers in some cases. Mechanistic studies suggest that this reaction may proceed via an unprecedented Friedel–Crafts-type reactionpathway under base conditions with the assistance
Benzylation of arenes with benzyl ethers promoted by the in situ prepared superacid BF3–H2O
作者:Yu Li、Yan Xiong、Xueming Li、Xuege Ling、Ruofeng Huang、Xiaohui Zhang、Jianchun Yang
DOI:10.1039/c4gc00005f
日期:——
An efficient and environmentally friendly benzylation of arenes with benzyl ethers as benzyl donors using BF3âEt2O to generate in situ the superacid BF3âH2O as an efficient promotor has been described. A wide variety of functional groups have been investigated and found to be compatible to give the desired diarylmethanes in yields of up to 99%. The crucial role of the moisture content in this transformation has been demonstrated by detailed investigations.
Process for the preparation of optionally substituted 2-benzyl-toluenes
申请人:Bayer Aktiengesellschaft
公开号:US04814483A1
公开(公告)日:1989-03-21
Optionally substituted 2-benzyl-toluenes can be prepared by reaction of optionally substituted 2-benzyl-tert.-alkyl-toluenes with an optionally substituted aromatic hydrocarbon in the presence of anhydrous iron-(III) halide. The reaction is carried out at ambient to elevated temperature. The optionally substituted aromatic hydrocarbon is employed in molar excess, relative to the 2-benzly-tert.-alkyl-toluenes.