摘要 β-烯胺酮及其衍生物已经出现在最好的生物活性中间体中。通过在磁性可分离的钴铁氧体纳米粒子(CoFe 2 O 4 NPs)上用环状/无环的1,3-二酮处理取代的芳香族和脂肪族胺,可以实现几种β-烯酮的高收率(86-97%)。后者是在共沉淀条件下制备的。通过傅立叶变换红外光谱,X射线衍射,能量色散X射线光谱法,扫描电子显微镜,振动样品磁法和热重分析分析,确认了其纯度,精细的结晶度,元素分布,形态,磁性和热稳定性。因此,CoFe 2 O 4NPs是合成β-烯胺酮的优良绿色异质纳米催化剂,具有良好的可回收性,但其活性却微不足道。 图形概要
Cerium(III) Chloride Heptahydrate (CeCl3 · 7H2O) as an Efficient Enamination Catalyst in Aqueous Media
作者:M. M. Khodaei、A. R. Khosropour、M. Kookhazadeh
DOI:10.1007/s11178-005-0363-z
日期:2005.10
Cerium(III) chloride heptahydrate CeCl3 · H2O catalyzes enamination of β-dicarbonyl compounds with primary amines in aqueous medium at room temperature to afford the corresponding β-enamino ketones with high chemoselectivity.
The role of a Lewis acid in the Nenitzescu indole synthesis
作者:Valeriya S. Velezheva、Andrey I. Sokolov、Albert G. Kornienko、Konstantin A. Lyssenko、Yulia V. Nelyubina、Ivan A. Godovikov、Alexander S. Peregudov、Andrey F. Mironov
DOI:10.1016/j.tetlet.2008.09.087
日期:2008.12
A highly efficient Lewis acid-catalyzed method for the Nenitzescusynthesis of 5-hydroxyindoles with a range of substituents at N-1 and C-3 and symmetric 5,5′-dihydroxydiindoles has been developed. The amount of the catalyst (10–100 mol %) required depended on the nature of the enaminone component. It has been shown that Lewis acid plays a role in enaminone component activation through an enamine-ZnC12
Enamination of a wide various primary amines was successfully carried out in the presence of catalytic amounts of cerium chloride heptahydrate in ionic liquid and solvent-free conditions as 'green' media under mild reaction conditions.
Influence of fluorine substitution on the properties of metal chelate compounds—II copper(II) chelates of tetradentate ligands
作者:A.E. Martell、R. Linn Belford、M. Calvin
DOI:10.1016/0022-1902(58)80127-x
日期:1958.1
The ultra-violet visible, and infra-redabsorption spectra of four Schiff bases derived from β-diketones and their copper(II) chelates are described and discussed in relation to the structure of these molecules. Infra-red assignments are made where possible. The influence of fluorine substitution and ring size on the ultra-violet and visible spectra of the chelate compounds is discussed, and interrelationships