TiCl4-Catalyzed Intermolecular Hydroamination Reactions of Norbornene
摘要:
An intermolecular hydroamination reaction of norbornene is presented that uses catalytic amounts of user-friendly TiCl4 and tolerates a variety of functional groups. In addition, a secondary amine is converted using this methodology.
Abstractmagnified imageA direct amination of simple cycloalkanes with nitroarenes mediated by peroxides has been discovered. Various secondary arylamines were obtained efficiently from cycloalkanes. The reaction tolerates a wide range of functionalities as well as aqueous conditions. No metal was required for this novel amination reaction.
Intermolecular hydroamination and hydroarylation reactions of alkenes in ionic liquids
作者:Alexandre A.M. Lapis、Brenno A. DaSilveira Neto、Jackson D. Scholten、Fabiane M. Nachtigall、Marcos N. Eberlin、Jairton Dupont
DOI:10.1016/j.tetlet.2006.07.073
日期:2006.9
hydroamination or hydroarylation reactions of norbornene and cyclohexadiene performed with catalytic amounts of Brönsted or Lewis acid in ionic liquids were found to provide higher selectivity and yields than those performed in classical organic solvents. The ionic liquid increases the acidity of the media and stabilizes ionic intermediates through the formation of supramolecular aggregates.
HI-Catalyzed Hydroamination and Hydroarylation of Alkenes
作者:Sven Doye、Klaudia Marcseková
DOI:10.1055/s-2006-958934
日期:2007.1
Aromatic amines react with alkenes in the presence of catalytic amounts of aqueous HI to give mixtures of the corresponding hydroamination and hydroarylation products. While the hydroamination reaction is the preferred pathway for aliphatic alkenes, the hydroarylation reaction becomes more important when styrenes are used as substrates. In general, the electronic properties of the alkene and the amine strongly influence the efficiency and the selectivity of the reaction.
Inter- and Intramolecular Hydroamination of Unactivated Alkenes Catalysed by a Combination of Copper and Silver Salts: The Unveiling of a Brønstedt Acid Catalysis
The combined use of a copper halide, a silver salt and a phosphane ligand was applied for the catalysis of inter- and intramolecularhydroamination of alkenes. The reactions of unactivated olefins with nitrogen substrates were investigated. Mechanistic investigations demonstrated that the catalytic system generated a Brønsted acid which appeared to be the prominent catalytic species.
addition of sulfonamides and carboxamides to simple alkenes proceeded smoothly using a proton-exchanged montmorillonite catalyst. The spent catalyst was recovered easily from the reaction mixture and was reusable at least five times without any loss of activity. The unique acidity of the proton-exchanged montmorillonite (H-mont) catalyst was found to be applicable to additional reactions: substitution of hydroxyl
Unexpected catalytic and stereoselective hydroarylation of norbornene during the attempted rhodium-catalysed hydroamination of norbornene with aniline or diphenylamine
The reaction of aniline (or diphenylamine) with norbornene in the presence of a catalytic system generated from [Rh(PEt3)2Cl}2] and PhNHLi (or Ph2NLi) results in hydroarylation to yield 2-(2-aminophenyl)norbornane [or 2-(2-phenylaminophenyl)norbornane].