Deoxygenation of α,β-unsaturated acylphenols through ethyl o-acylphenylcarbonates with Luche reduction
摘要:
An efficient protocol for deoxygenation of alpha,beta-unsaturated acylphenols through ethyl o-acylphenylcarbonates with Luche reduction is described. The reaction shows very good selectivity and tolerates a wide range of functionalities on alpha,beta-unsaturated acylphenols, giving corresponding 2-allylphenols in good to excellent yields. (C) 2013 Elsevier Ltd. All rights reserved.
[EN] PROCESSES FOR THE PREPARATION OF ORTHO-ALLYLATED HYDROXY ARYL COMPOUNDS<br/>[FR] PROCÉDÉS DE PRÉPARATION DE COMPOSÉS HYDROXY-ARYLE ORTHO-ALLYLÉS
申请人:UNIV MCMASTER
公开号:WO2021237371A1
公开(公告)日:2021-12-02
The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (I) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted. The present application also includes compounds of Formula (I).
Allylicarylation of cinnamyloxyphenylboronic acid pinacol esters 3, which have arylboronicacid moiety and allylicether moiety, using a hydrazone 1d–Pd(OAc)2 system proceeded and gave the corresponding 1,3-diarylpropene derivatives 4 with a phenolic hydroxyl group via a selective coupling reaction of the π-allyl intermediate to the boron-substituted position of the leaving group.
Brønsted Acid-Catalyzed Nucleophilic Substitution of Alcohols
作者:Roberto Sanz、Alberto Martínez、Delia Miguel、Julia M. Álvarez-Gutiérrez、Félix Rodríguez
DOI:10.1002/adsc.200606183
日期:2006.9
Brønsted acids such as p-toluenesulfonic acid monohydrate (PTS) or polymer-bound p-toluenesulfonic acid efficiently catalyze the direct nucleophilic substitution of the hydroxygroup of allylic and benzylic alcohols with a large variety of carbon- and heteroatom-centered nucleophiles. Reaction conditions are mild, the process is conducted under an atmosphere of air without the need for dried solvents
Catalytic, Enantioselective, Intramolecular Sulfenofunctionalization of Alkenes with Phenols
作者:Scott E. Denmark、David J. P. Kornfilt
DOI:10.1021/acs.joc.7b00295
日期:2017.3.17
The catalytic, enantioselective, cyclization of phenols with electrophilic sulfenophthalimides onto isolated or conjugated alkenes affords 2,3-disubstituted benzopyrans and benzoxepins. The reaction is catalyzed by a BINAM-based phosphoramide Lewis base catalyst which assists in the highly enantioselective formation of a thiiranium ion intermediate. The influence of nucleophile electron density, alkene
Lewis-Acid-Mediated Intramolecular Trifluoromethylthiolation of Alkenes with Phenols: Access to SCF<sub>3</sub>-Containing Chromane and Dihydrobenzofuran Compounds
A Lewis-acid-mediated intramolecular trifluoromethylthiolation of alkenes with phenols that can offer direct access to SCF3-containing chromane and dihydrobenzofuran compounds was disclosed for the first time. Numerous SCF3-containing chromanes were obtained in moderate to good yields using γ-substituted 2-allyphenols as substrates. Meanwhile, various SCF3-containing dihydrobenzofurans with oxa-quaternary