Gold-Catalyzed Synthesis of Substituted Tetrahydronaphthalenes
作者:Christiane M. Grisé、Louis Barriault
DOI:10.1021/ol062582g
日期:2006.12.1
We report a gold-catalyzed benzannulation of 3-hydroxy-1,5-enynes to generate tetrahydronaphthalenes. This mild process proves to be an effective method to synthesize various metasubstituted aromatic rings in good yields. [reaction: see text]
Quenched skeletal Ni as the effective catalyst for selective partial hydrogenation of polycyclic aromatic hydrocarbons
作者:Chengyun Liu、Zeming Rong、Zhuohua Sun、Yong Wang、Wenqiang Du、Yue Wang、Lianhai Lu
DOI:10.1039/c3ra44871a
日期:——
Quenched skeletal Ni is an active and selective catalyst for selective partial hydrogenation of polycyclicaromatichydrocarbons (PAHs). The molecular structure of PAHs significantly dominate the hydrogenation process and furthermore, the distribution of hydrogenated products.
Direct CâH bond arylation of simple arenes with aryltin reagents has been successfully catalysed by PdCl2 in the presence of CuCl2. CuCl2 proved to be an activator for a palladium intermediate as well as an oxidant.
Microwave accelerated facile synthesis of fused polynuclear hydrocarbons in dry media by intramolecular Friedel–Crafts alkylation
作者:Vanya B. Kurteva、António Gil Santos、Carlos A. M. Afonso
DOI:10.1039/b311750m
日期:——
Fused polynuclear tetrahydro arenes are synthesised in a fast, simple, high yielding and regiospecific procedure by an intramolecular FriedelâCrafts alkylation in dry media under microwave irradiation of the corresponding 1-bromo-4-arylbutanes immobilised on silica. The observed reactivity is rationalised by molecular modelling studies which suggest the occurence of a concerted mechanism.
Gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes: an efficient synthesis of substituted tetrahydronaphthalenes and related compounds
作者:Christiane M. Grisé、Eric M. Rodrigue、Louis Barriault
DOI:10.1016/j.tet.2007.10.084
日期:2008.1
We report a novel gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes to prepare tetrahydronaphthalenes. The reaction is catalyzed by 2.5 mol % Ph3PAuCl and 2.5 mol % AgOTf in dichloromethane. We discovered that this process can be also catalyzed by 1 mol % Ph3PAuCl and 1 mol % TfOH. To the best of our knowledge, this constitutes the first report of an active gold catalyst generated from Au(PPh3)Cl