An Efficient Synthesis of Organic Carbonates using Nanocrystalline Magnesium Oxide
作者:M. Lakshmi Kantam、Ujjwal Pal、B. Sreedhar、B. M. Choudary
DOI:10.1002/adsc.200600525
日期:2007.7.2
An efficient and selective synthesis of organiccarbonatesusingnanocrystallinemagnesiumoxide has been realized by the direct condensation of alcohols and diethyl carbonate. The catalyst is quantitatively recovered by simple centrifugation and can be reused for four cycles with almost consistent activity.
Catalytic Activity of MCM-41–TBD in the Selective Preparation of Carbamates and Unsymmetrical Alkyl Carbonates from Diethyl Carbonate
作者:Silvia Carloni、Dirk E. De Vos、Pierre A. Jacobs、Raimondo Maggi、Giovanni Sartori、Raffaella Sartorio
DOI:10.1006/jcat.2001.3439
日期:2002.1
The synthesis of carbamates 3 and unsymmetrical alkyl carbonates 5 by reaction of diethyl carbonate with aliphatic amines or alcohols has been realized by using as heterogeneous catalyst a hybrid organic–inorganic material prepared by anchoring TBD to MCM-41 silica. Products are obtained in high yield and very good selectivity and the solid catalyst can be recovered simply by filtration and reused
An efficient synthesis of organic carbonates: atom economic protocol with a new catalytic system
作者:Bhaskar Veldurthy、Fran�ois Figueras
DOI:10.1039/b316050e
日期:——
Selective and solvent free synthesis of unsymmetricalorganiccarbonates catalysed by a reusable MgLa mixed oxide is achieved for the first time via direct condensation of an alcohol and diethyl carbonate in economic route with excellent yields.
A green, efficient, and selectivesynthesis of unsymmetricalorganiccarbonates is realised in the liquid phase by direct condensation of an alcohol and diethyl carbonate, in an eco-compatible route, in the presence of a recyclable heterogeneous solid-base CsF/α-Al2O3 catalyst. The catalyst displayed unprecedented activity after activation at 393 K for 4 h and produced quantitative yields with a greater
Immobilization of 1,5,7‐Triazabicyclo[4.4.0]dec‐5‐ene on Magnetic γ‐Fe
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O
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Nanoparticles: A Highly Recyclable and Efficient Nanocatalyst for the Synthesis of Organic Carbonates
作者:Liqiang Wu、Shuanbao Tian
DOI:10.1002/ejic.201301586
日期:2014.4
1,5,7-Triazabicyclo[4.4.0]dec-5-ene was immobilized on magnetic γ-Fe2O3 nanoparticles as a magneticnanocatalyst. The nanoparticle reagent was obtained with good loading levels and has been successfully used for the efficient and selective synthesis of organic carbonates by the direct condensation of alcohols and diethyl carbonate. The catalyst is quantitatively recovered by an external magnet and