Facile <i>N</i>-Arylation of Amines and Sulfonamides and <i>O</i>-Arylation of Phenols and Arenecarboxylic Acids
作者:Zhijian Liu、Richard C. Larock
DOI:10.1021/jo0602221
日期:2006.4.1
An efficient, transition-metal-free procedure for the N-arylation of amines, sulfonamides, and carbamates and O-arylation of phenols and carboxylicacids has been achieved by allowing these substrates to react with a variety of o-silylaryl triflates in the presence of CsF. Good to excellent yields of arylated products are obtained under very mild reaction conditions. This chemistry readily tolerates
Palladium(0)-Catalyzed Intermolecular Arylative Dearomatization of β-Naphthols
作者:Ren-Qi Xu、Ping Yang、Hang-Fei Tu、Shou-Guo Wang、Shu-Li You
DOI:10.1002/anie.201608724
日期:2016.11.21
The first Pd0‐catalyzed intermolecular arylative dearomatization of β‐naphthols with aryl halides is described. It was found that Q‐Phos could facilitate the palladium‐catalyzed cross‐coupling‐type dearomatization of β‐naphthols, while avoiding O‐arylation, to construct 2‐naphthalenones in excellent yields and with high chemoselectivity.
Oxidative Dearomatization of Phenols and Anilines via λ3- and λ5-Iodane-Mediated Phenylation and Oxygenation
作者:S. Quideau、L. Pouységu、A. Ozanne、J. Gagnepain
DOI:10.3390/10010201
日期:——
Treatment of 2-methylphenols with chloro(diphenyl)-λ3-iodane led to theirregioselective dearomatizing 2-phenylation into cyclohexa-2,4-dienone derivatives via aproposed ligand coupling reaction. In the same vein of investigation, treatment of2-methylanilines with the λ5-iodane 2-iodoxybenzoic acid IBX reagent led to theirregioselective dearomatization into previously undescribed ortho-quinol imines.
Recyclable Cu-nanoparticles provide an efficient, economic, and novel method for the synthesis of diaryl ethers viaUllmann type coupling. This method provides a wide range of substrate applicability and avoids the use of a heavy metal co-catalyst and gives diaryl ethers in satisfactory yields.
[EN] METHOD FOR PREPARING BORIC ACID ESTER BASED ON LITHIUM COMPOUND<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ESTER D'ACIDE BORIQUE À BASE DE COMPOSÉ DE LITHIUM<br/>[ZH] 基于锂化合物制备硼酸酯的方法