C(aryl)-O Bond Formation from Aryl Methanesulfonates via Consecutive Deprotection and SNAr Reactions with Aryl Halides in an Ionic Liquid
作者:Hui Xu、Yang Chen
DOI:10.3390/12040861
日期:——
(1-butyl-3-methylimidazolium tetrafluoroborate) as solvent has been developed. The procedure involves consecutive deprotection of aryl methane-sulfonates and a nucleophilic aromatic substitution (S(N)Ar) with activated aryl halides.
Microwave‐Assisted Construction of Diaryl Ethers Directly from Arylmethanesulfonates as Convenient Latent Phenols with Aryl Halides
作者:Hui Xu、Yang Chen
DOI:10.1080/00397910701412901
日期:2007.7
Abstract The microwave‐assisted synthesis of diaryl ethers directly fromarylhalides and arylmethanesulfonates, which as latent phenols obviate a deprotection step prior to the SNAr reaction, in the presence of Cs2CO3 is described. The reaction time was very short (6–9 min), and good to excellent yields (53–90%) with the wide substrate scope were achieved without any catalyst.
A Fast Way to Fluorescence: A Fourfold Domino Reaction to Condensed Polycyclic Compounds
作者:Lutz F. Tietze、Christoph Eichhorst、Tim Hungerland、Markus Steinert
DOI:10.1002/chem.201402961
日期:2014.9.22
A fast and efficient palladium‐catalyzed fourfolddomino Sonogashira/double‐carbopalladation/CH‐activation reaction that converts simple aromatic systems into complex polycyclic hydrocarbons has been developed. A number of substituted products has thus been prepared in yields up to 89 %. The structural assignment has been confirmed by using single‐crystal X‐ray crystallography. The products show intriguing
一种快速和有效的钯催化的四倍多米诺的Sonogashira /双carbopalladation / C H-活化反应,其将简单芳族体系成复杂的多环烃已经研制成功。因此已经制备了许多取代的产物,产率高达89%。通过使用单晶X射线晶体学已确认了结构分配。该产品显示出令人着迷的荧光活性,因此可以用作化学传感器或荧光成像染料。
Chemoselective arylation of phenols with bromo-nitroarenes: synthesis of nitro-biaryl-ols and their conversion into benzofurans and carbazoles
A series of substituted phenols were chemoselectively arylated with bromo-nitroarenes using KOtBu at room temperature via an SNAr pathway.
一系列取代酚在室温下使用KOtBu与溴化硝基芳烃进行化学选择性芳基化,通过SNAr途径。
Potassium Fluoride Supported on Natural Nanoporous Zeolite: A New Solid Base for the Synthesis of Diaryl Ethers
作者:Mohammad A. Khalilzadeh、Abolfazl Hosseini、Afsaneh Pilevar
DOI:10.1002/ejoc.201001447
日期:2011.3
An efficient and inexpensive synthesis of diarylethers has been developed. The process involves the nucleophilicaromaticsubstitution of electron-deficient aryl halides and phenols and is mediated by potassium fluoride/Clinoptilolite (KF/CP) in dimethyl sulfoxide (DMSO). The approach affords good to excellent yields of the arylated products without the need for additional cation capture. The solid