On-water magnetic NiFe<sub>2</sub>O<sub>4</sub> nanoparticle-catalyzed Michael additions of active methylene compounds, aromatic/aliphatic amines, alcohols and thiols to conjugated alkenes
作者:Soumen Payra、Arijit Saha、Subhash Banerjee
DOI:10.1039/c6ra21160g
日期:——
Here, we have demonstrated the Michael addition of active methylene compounds, aromatic/aliphaticamines, thiols and alcohols to conjugated alkenes using magnetic nano-NiFe2O4 as reusable catalyst in water. Nano-NiFe2O4 efficiently catalyzed the formation of C–C and C–X (X = N, S, O etc.) bond through 1,4-addition reactions.
在这里,我们已经证明了使用磁性纳米NiFe 2 O 4作为在水中可重复使用的催化剂将活性亚甲基化合物,芳香族/脂肪族胺,硫醇和醇的迈克尔加成到共轭烯烃上。纳米NiFe 2 O 4通过1,4-加成反应有效催化了CC和CX (X = N,S,O等)键的形成。
Rhodium-catalyzed michael additions of activated nitriles to α,β - unsaturated esters
The Michael additions of activatednitriles to methyl acrylate (MA) and methyl vinyl ketone (MVK) proceeds with fair to high yields (46–92%) in the presence of catalytic amount of HRh(CO)(PPh3)31 under mild eaction conditions.
Cesium Carbonate Supported on Alumina for the Michael Addition of Diethyl Malonate to Methyl Acrylates
作者:Tetsunari Hida、Kenichi Komura、Yoshihiro Sugi
DOI:10.1246/bcsj.20110115
日期:2011.9.15
The cesium salts supported on γ-Al2O3 were highly active catalysts for the Michael addition of diethyl malonate (1) to methyl acrylate (2) in toluene as solvent. The use of a limited amount of 2 gave diethyl [2-(methoxycarbonyl)ethyl]malonate (3), however the formation of diethyl bis[2-(methoxycarbonyl)ethyl]malonate (4) was enhanced by the increase in amounts of 2. Catalytic activities were easily recovered by the calcination of used catalysts. IR and XRD observations indicate that the active catalytic species are Cs2CO3 on Al2O3. The use of malononitrile enhanced the formation of the diadduct as principal products by addition to methyl acrylate. Other methyl acrylates, such as methyl methacrylate and methyl crotonate, gave low yield of the products.
Evidence for organoironcarbonylate anion formation in nucleophilic addition to tetracarbonyliron complexes of acrylate esters
作者:Bryan W. Roberts、Mark Ross、Janice Wong
DOI:10.1039/c39800000428
日期:——
Sequential addition of stabilized anions and alkyl iodides to tetracarbonylironcomplexes of methyl acrylate and methyl crotonate affords products consistent with regiospecific generation and alkylation of an organoironcarbonylate anion intermediate.
Supported phenolates as efficient catalysts of the Michael reaction
作者:Duncan J Macquarrie
DOI:10.1016/s0040-4039(98)00672-8
日期:1998.6
Simple, heterogeneous base catalysts based on supported phenolates can be easily prepared and are very active and selective in the Michael reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.