Construction of oxygen-bridged multimetallic assembly: dual catalysts for hydroamination reactions
作者:Arup Mukherjee、Tamal K. Sen、Swadhin K. Mandal、Bholanath Maity、Debasis Koley
DOI:10.1039/c2ra21778c
日期:——
Herein, we utilized multiple metal centers of a single catalytic system for two different activation processes in hydroamination catalysis. A trimetallic complex, [Cp*2(Me)Zr(μ-O)Zr(NMe2)2(μ-O)Zr(Me)Cp*2] (2) bearing three zirconium(IV) ions bridged by two oxygencenters was synthesized by the reaction of Cp*2(Me)Zr(OH) (Cp* = η5-C5Me5) with Zr(NMe2)4 in a 2 : 1 molar ratio at room temperature. The
Ligand acceleration in ZnI2-catalyzed intramolecular hydroamination of unfunctionalized olefins
作者:Gong-Qing Liu、Wei Li、Yu-Mei Wang、Zhen-Ying Ding、Yue-Ming Li
DOI:10.1016/j.tetlet.2012.06.033
日期:2012.8
studied. Preliminary results indicated that both steric and electronic factors are crucial for this Lewisacid-promotedreaction. ZnI2 gave the most promising results and the reactivity could be further increased upon addition of a suitable ligand. Up to 95% isolated yields were obtained when the reactions were carried out in 1,4-dioxane in the presence of 10 mol % of ZnI2 and 8-hydroxyquinoline.
Catalytic Intramolecular Hydroamination with a Bifunctional Iridium Pyrazolato Complex: Substrate Scope and Mechanistic Elucidation
作者:Yohei Kashiwame、Shigeki Kuwata、Takao Ikariya
DOI:10.1021/om301063n
日期:2012.12.10
bifunctional catalyst promoted the hydroamination of various primary and secondary aminoalkenes at mild temperatures (50–110 °C) without side reactions such as oxidative amination. Cyclization of secondary aminoalkenes containing ester, cyano, bromo, and hydroxy groups occurred with maintenance of these functional groups, while the reactions of aminoalkenes bearing allylic substituents proceeded with a perfect
A New Method for Intramolecular Chloroamination of Unfunctionalized Olefins
作者:Gong-Qing Liu、Wei Li、Yue-Ming Li
DOI:10.1002/adsc.201200352
日期:2013.1.25
A newmethod for the intramolecularchloroamination of unfunctionalizedolefins is reported. The reactions were carried out at room temperature for 3 h using hydrated copper(II) chloride as both promoter and chlorine source, and the corresponding vincinal haloamines were obtained in good isolated yields.
MnI2-catalyzed regioselective intramolecular iodoamination of unfunctionalized olefins
作者:Hui Sun、Bin Cui、Gong-Qing Liu、Yue-Ming Li
DOI:10.1016/j.tet.2016.09.038
日期:2016.11
MnI2-catalyzed intramolecular iodoamination of unfunctionalized olefins was reported. Interaction of MnI2 with N-alkenyl amine/sulfonamide gave NRMnI which produced a CH2MnI intermediate via intramolecular aminometallation of CC double bond. Reductive elimination of CH2I from CH2MnI produced iodomethyl heterocycle with the release of Mn(0) which was confirmed by XPS and XRD experiments.