CN键的形成被认为是非常有用且基本的反应,这对于有机化学和药物化学中含氮分子的合成非常重要。贵金属和均相催化剂经常被用于形成CN键,但是,这些催化剂仍然存在一些问题,例如成本高,污染严重和原子经济性低。在此将低毒且便宜的铁络合物负载在CNT上,并制备了名为Fe-N x / CNTs的异质单原子催化剂(SAC)。我们首次将这种SAC应用于CN键的合成。发现Fe-N x / CNTs是从芳族胺和酮合成CN键的有效催化剂。催化性能非常出色,产率高达96%,比贵金属催化剂(例如AuCl 3 / CNT和RhCl 3 / CNT)高6倍。它适用于多达13种不含添加剂的芳族胺底物,并获得17种烯胺酮。通过将高角度环形暗场扫描透射电子显微镜(HAADF-STEM)与X射线吸收光谱法(XAS)结合使用,我们观察到Fe-N x / CNTs的铁物种分散良好,因为单原子和Fe- N x可能是催化活性位点。该Fe-N
A novel enamination of β-dicarbonyl compounds catalyzed by Bi(TFA)<sub>3</sub> immobilized on molten TBAB
作者:Mohammad M Khodaei、Ahmad R Khosropour、Mehdi Kookhazadeh
DOI:10.1139/v05-021
日期:2005.3.1
Enamination of a wide variety of primary amines was successfully carried out in the presence of catalytic amounts of bismuth(III) trifluoroacetate immobilized on molten tetrabutylammonium bromide as "green" media under mild conditions. This new system of the catalyst is recyclable and reusable. Generally, the results of the reaction in tetrabutylammonium bromide is better than the previously obtained
Enamination of a wide variety of primary amines was successfully described with excellent chemo-selectivity in the presence of catalytic amounts of β-cyclodextrin in water under mild conditions. Aliphatic amines also reacted efficiently to produce the corresponding enaminones.
Zinc Triflate Catalysed Synthesis of β-Enamino Ketones(Esters) under Solvent-Free Conditions
作者:Chengliang Feng、Shuguang Zhang、Jin Cai、Junqing Chen、Huayou Hu、Min Ji
DOI:10.3184/174751913x13787959859506
日期:2013.10
An efficient and mild procedure is described for the synthesis of a series of β-enaminoketones(esters) from 1,3-dicarbonyl compounds and aliphatic and aromatic amines using zinc triflate as the catalyst.
Solvent-free synthesis of β-enamino ketones and esters catalysed by recyclable iron(III) triflate
作者:Cheng-Liang Feng、Ning-Ning Chu、Shu-Guang Zhang、Jin Cai、Jun-Qing Chen、Hua-You Hu、Min Ji
DOI:10.2478/s11696-014-0544-8
日期:2014.1.1
A novel application of highly stable Fe(OTf)3 as an efficient catalyst for the synthesis of a variety of β-enaminoketones and esters under solvent-free conditions is described. Notably, this protocol of a “green synthesis”, which produced β-enaminoketones and esters by the reaction of a variety of β-dicarbonyl compounds and primary amines, exhibits attractive properties including high yields, short
Silica supported Fe(HSO4)3 as an efficient, heterogeneous and recyclable catalyst for synthesis of β-enaminones and β-enamino esters
作者:Hossein Eshghi、Seyed Mohammad Seyedi、Elham Safaei、Mohammad Vakili、Abolghasem Farhadipour、Mohtaram Bayat-Mokhtari
DOI:10.1016/j.molcata.2012.07.021
日期:2012.11
the one-pot reaction of β-dicarbonyl compounds with various amines in the presence of silica ferric hydrogensulfate under solvent free conditions at room temperature. The reactions proceed smoothly in excellent yield, high chemoselectivity and with an easy work-up. Catalytic amount of Fe(HSO4)3·SiO2 catalyzed one-pot reaction of linear and cyclic β-diketones and β-ketoesters with aromatic and aliphatic