116703-73-2Relevant academic research and scientific papers
Photoredox-Catalyzed Ring-Opening Addition Reaction between Benzyl Bromides and Cyclic Ethers
Gu, Yucheng,Hu, Jinbo,Kuang, Cuiwen,Ni, Chuanfa
, (2021/12/24)
A novel nucleophilic reaction between cyclic ethers and benzyl bromides is achieved under photoredox catalysis. The reaction proceeds through a single-electron-transfer (SET) pathway rather than a common SN2 mechanism. By two steps of reduction and oxidation, a benzyl bromide heterolyzes to give a carbocation and bromide ion under mild conditions, and then a cyclic ether captures both the carbocation and bromide ion to afford the addition product.
Generation of Carbocations under Photoredox Catalysis: Electrophilic Aromatic Substitution with 1-Fluoroalkylbenzyl Bromides
Gu, Yucheng,Hu, Jinbo,Kuang, Cuiwen,Ni, Chuanfa,Xie, Qiqiang,Zhou, Xin
supporting information, (2020/11/13)
A novel Friedel-Crafts-type alkylation of arenes to access valuable 1-fluoroalkyl-1,1-biaryl compounds is established under mild conditions. The key to success is the efficient generation of a destabilized benzylic carbocation intermediate via two consecutive single-electron transfer processes by virtue of visible-light photoredox catalysis. This unique activation pattern avoids using strong Lewis acids and high temperatures that are required for generation of destabilized carbocations in traditional Friedel-Crafts reactions. This protocol demonstrates the first example of photoredox-catalyzed heterolysis of electronically deactivated benzylic C-Br bonds for the formation of destabilized carbocation intermediates.
The Extraordinarily Long Lifetimes and Other Properties of Highly Destabilized Ring-Substituted 1-Phenyl-2,2,2-trifluoroethyl Carbocations
Richard, John P.
, p. 1455 - 1465 (2007/10/02)
A large bromide common ion rate depression is observed for the reactions of 1-(4-methoxyphenyl)- and 1-(4-(methylthio)phenyl)-2,2,2-trifluoroethyl bromides in largely aqueous solutions when the ionic strenght is maintained with weakly nucleophilic NaClO4
