Synthesis of methyl acetoacetate from acetone and dimethyl carbonate with alkali-promoted MgO catalysts
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Dudu Wu
und
Zhi Chen
Abstract
The synthesis of methyl acetoacetate (MAA) by methoxycarbonylation of acetone with dimethyl carbonate (DMC) was carried out in the presence of MgO and alkali-promoted MgO catalysts. From among Li, Na, K, and Cs, potassium was found to be the most effective promoter to improve the activity of MgO. The effect of K/MgO with variable content of K was also investigated, and the individual catalysts were characterised by the XRD, BET, SEM, CO2-TPD, and in situ CO2 IR techniques. The results showed that the addition of a small amount of K (1.97 mass %) could promote MAA formation, but a higher K loading caused a decrease in the yield of MAA, which might result from particle agglomeration and the presence of stable potassium carbonates. In situ FTIR experiments of co-adsorbed reactants indicated that the reaction probably proceeded via abstraction of Hα from acetone by base sites.
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© 2010 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Chemical conjugation of biomacromolecules: A mini-review
- Talaromyces flavus and its metabolites
- Application of non-steroidal anti-inflammatory drugs for palladium determination
- A naked-eye, selective and sensitive chemosensor for fluoride ion
- Determination of catechin and epicatechin in the peel of apple varieties resistant and non-resistant to apple scab
- The use of sulfated tin oxide as solid superacid catalyst for heterogeneous transesterification of Jatropha curcas oil
- Effect of pH and washing on calcium and magnesium distribution between pulp and filtrate
- Influence of lead dioxide electrodes morphology on kinetics and current efficiency of oxygen-ozone evolution reactions
- Synthesis of methyl acetoacetate from acetone and dimethyl carbonate with alkali-promoted MgO catalysts
- Synthesis, crystal structure, and 1H NMR spectra of a chloride-bridged chain complex of dinuclear ruthenium(II,III) 3,4,5-tri(ethoxy-d 5)benzoate
- Modification of poly(vinyl alcohol) membrane via blending with poly(γ-benzyl l-glutamate)-block-poly(ethylene glycol) copolymer
- Oxidative polymerization of anilinium 5-sulfosalicylate with peroxydisulfate in water
- Morphological patterns of poly(N-isopropylacrylamide) derivatives synthesized with EGDMA, DEGDMA, and TEGDMA crosslinkers for application as thermosensitive drug carriers
- Influence of a Fe/activated carbon catalyst and reaction parameters on methane decomposition during the synthesis of carbon nanotubes
- Microwave assisted one pot synthesis of 7-substituted 2-(2-oxo-2H-chromen-3-yl)acetic acids as precursors of new anti-tumour compounds
- ZnO nanoparticles in the synthesis of AB ring core of camptothecin
- Novel benzopyranopyridine derivatives of 2-amino-3-formylchromone
- Polyethylene glycol-mediated synthesis of decahydroacridine-1,8-diones catalyzed by ceric ammonium nitrate
