Structural and solvent/electrolyte effects on the selectivity and efficiency of the anodic oxidation of para-substituted aromatic ethers. An efficient route to quinol ether ketals and quinol ethers
Oxidations of substituted phenols with hypervalent iodine : Applications to the phthalide annulation route to anthraquinones
作者:Anthony S. Mitchell、Richard A. Russell
DOI:10.1016/0040-4039(93)85123-e
日期:1993.1
Substituted phenols are oxidized by phenyliodonium diacetate in methanol to yield either cyclohexa-2,4- or the isomeric 2,5-dienones depending upon the structure of the phenol. Annulation of these oxidation products with the anion of 3-cyanophthalide affords access to a range of anthraquinones not previously accessible by this route.
regioselective C–P cross coupling reaction of p-quinol ethers with secondary phosphine oxides is reported. The reaction provides a facile alternative method for the synthesis of 2-phosphinylphenols in good to high yields. Mechanistically, zinc triflate may serve as an oxophilic σ-Lewis acid to activate the C–O bond in p-quinol ether first. Then the regioselective attack of the phosphorus nucleophile at the α-carbon
Site-selective 1,3-double functionalization of arenes using <i>para</i>-quinol, C–N, and C–C/C–P three-component coupling
作者:Saddam Husen、Anil Chauhan、Ravindra Kumar
DOI:10.1039/c9gc04103f
日期:——
A catalytic and site-selective approach has been demonstrated for dual functionalization of arenes via cross-coupling reactions of p-quinols with amines and isocyanides/phosphites.
Oxidation with hypervalent iodine reagents. Part II: Novel cyclohexadienones as precursors for the synthesis of anthraquinones
作者:Anthony S. Mitchell、Richard A. Russell
DOI:10.1016/s0040-4020(97)00110-5
日期:1997.3
2,4-cyclohexadienones, 2,5-cyclohexadienones or mixtures of isomers, depending on the substrate being oxidized. Annulation of these cyclohexadienones with the anion of 3-cyanophthalide afforded anthraquinones in high yields.
meta-Selective Substitution of Phenols with Indoles via One-Pot Oxidative Dearomatization-Michael Addition-Aromatization
作者:Renhua Fan、Yang Ye、Hua Wang
DOI:10.1055/s-0030-1259726
日期:2011.4
An oxidative coupling strategy involving hypervalent organoiodine-induced oxidative dearomatization of 4-substituted phenols, Brønsted acid catalyzed Michael addition with indoles, and aromatization has been developed. The one-pot reaction provides an efficient access to the meta-indole-substituted phenol derivatives.