METHOD FOR PREPARING CHEMICAL COMPOUNDS OF INTEREST BY NUCLEOPHILIC AROMATIC SUBSTITUTION OF AROMATIC CARBOXYLIC ACID DERIVATIVES SUPPORTING AT LEAST ONE ELECTRO-ATTRACTIVE GROUP
申请人:Mortier Jacques
公开号:US20120316337A1
公开(公告)日:2012-12-13
Method for preparing carboxylic acid derivatives by aromatic nucleophilic substitution, in which a carboxylic acid derivative having a single carboxyl functional group, or one of the salts thereof, the carboxylic acid derivative having, in the ortho position of the carboxyl functional group, a leaving group, which is preferably an atom of fluorine or of chlorine or an alkoxy group, chiral or not, preferably a methoxy group, the carboxylic acid derivative not being substituted by an electro attractive group other than the leaving group if any; is reacted with a reactant MNu, where M is a metal and Nu is a nucleophile, chiral or not, the aromatic nucleophilic substitution reaction being carried out without a catalyst and without a step of protecting/deprotecting the acid functional group of the starting compound.
Beyond Classical Reactivity Patterns: Hydroformylation of Vinyl and Allyl Arenes to Valuable β- and γ-Aldehyde Intermediates Using Supramolecular Catalysis
作者:Paweł Dydio、Remko J. Detz、Bas de Bruin、Joost N. H. Reek
DOI:10.1021/ja503033q
日期:2014.6.11
regioselective hydroformylation of vinyl and allyl arenes bearing an anionic group. In principle, the binding site of the ligand is used to preorganize a substrate molecule through noncovalent interactions with its anionic group to promote otherwise unfavorable reaction pathways. We demonstrate that this strategy allows for unprecedented reversal of selectivity to form otherwise disfavored β-aldehyde products
acids furnishing substituted naphthoic acids occurs in good to excellent yields upon reaction with alkyl/vinyl/aryl organolithium and Grignardreagents, in the absence of a metal catalyst without the need to protect the carboxyl (CO2H) group. This novel nucleophilic aromatic substitution is presumed to proceed via a precoordination of the organometallic with the substrate, followed by an addition/elimination
Study on the ArI-catalyzed intramolecular <i>oxy</i>-cyclization of 2-alkenylbenzamides to benzoiminolactones
作者:Huixia Liu、Xiaojun Deng、Xie Huang、Nan Ji、Wei He
DOI:10.1039/d0ob00612b
日期:——
A metal-free synthetic method toward the preparation of benzoiminolactones through oxy-cyclization of 2-alkenylbenzamides mediated by a catalyst/oxidant (ArI/mCPBA) system was developed.
works efficiently, promoted by BF3·OEt2 with the insertion of sulfur dioxide under mild conditions, leading to sulfonated 1-isoindolinones in moderate to good yields. This route is highly selective, and several competitivepathways are not observed under these conditions. A possible mechanism involving photocatalysis and a Lewis acid is proposed.