Thakkar; Jadhav, Journal of the University of Bombay, Science: Physical Sciences, Mathematics, Biological Sciences and Medicine, 1949, vol. 18/5 A, p. 30
BeCl2 as a new highly selective reagent for dealkylation of aryl-methyl ethers
作者:Hashem Sharghi、Fatemeh Tamaddon
DOI:10.1016/0040-4020(96)00815-0
日期:1996.10
An efficient and simple method is introduced for the selective removal of methyl group from poly aryl-methyl ethers, in some important derivatives of benzophenones, xanthones, anthraquinones, aryl esters, benzamides and nitroanisoles with BeCl2.
Efficient Aryl Migration from an Aryl Ether to a Carboxylic Acid Group To Form an Ester by Visible-Light Photoredox Catalysis
作者:Shao-Feng Wang、Xiao-Ping Cao、Yang Li
DOI:10.1002/anie.201706597
日期:2017.10.23
We have developed a highly efficient aryl migration from an arylether to a carboxylic acid group through retro‐Smiles rearrangement by visible‐light photoredox catalysis at ambient temperature. Transition metals and a stoichiometric oxidant and base are avoided in the transformation. Inspired by the high efficiency of this transformation and the fundamental importance of C−O bond cleavage, we developed
Formation of dibenzofurans by flash vacuum pyrolysis of aryl 2-(allyloxy)benzoates and related reactions
作者:Michael Black、J. I. G. Cadogan、Hamish McNab
DOI:10.1039/c002480e
日期:——
Flashvacuumpyrolysis (FVP) of aryl 2-(allyloxy)benzoates 5 and of the corresponding aryl 2-(allylthio)benzoates 6 at 650 °C, gives dibenzofurans 19 and dibenzothiophenes 20, respectively. The mechanism involves generation of phenoxyl (or thiophenoxyl) radicals by homolysis of the O-allyl (or S-allyl) bond, followed by ipso attack at the ester group, loss of CO2 and cyclisation of the resulting aryl
N-Heterocyclic carbene/photo-cocatalyzed oxidative Smiles rearrangement: synthesis of aryl salicylates from <i>O</i>-aryl salicylaldehydes
作者:Zi-Hao Xia、Lei Dai、Zhong-Hua Gao、Song Ye
DOI:10.1039/c9cc09272b
日期:——
The N-heterocyclic carbene/photo-cocatalyzed oxidative Smiles rearrangement of O-aryl salicylaldehydes was developed. Both electron-deficient and electron-rich aryls worked well as migrating groups, giving the corresponding aryl salicylates in good yields. This reaction features formation of two new C-O bonds and one C-O bond cleavage via metal-free oxidation of the Breslow intermediate using oxygen
Synthesis of salicylates from anionically activated aromatic trifluoromethyl group
作者:Huilin Xie、Chuankai Lin、Ruixiang Wang、Jin-Biao Liu
DOI:10.1016/j.tetlet.2021.153592
日期:2022.1
An efficient approach to salicylates via a novel transformation of anionically activated aromatic trifluoromethylgroup is described. Anionically activated trifluoromethylgroup can react with phenols/alcohols under alkaline conditions to afford aryl/alkyl salicylates in high yields. Mechanism studies indicate that the carbonyl oxygen atom of ester is from the H2O in the solvent.