A single centre aluminium(<scp>iii</scp>) catalyst and TBAB as an ionic organo-catalyst for the homogeneous catalytic synthesis of styrene carbonate

Supasitmongkol, Somsak; Styring, Peter

doi:10.1039/c3cy01015e

Cited by 84 publications

(46 citation statements)

References 21 publications

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“…70 Taking into account the diverse mechanisms found in the literature for the coupling of epoxide and CO 2 71-74 and DFT studies involving in particular zinc salphen, 69 a general mechanism can be illustrated for the M-N 2 O 2 /(n-Bu) 4 NX 30 catalytic system in Scheme 3. Considering that the reports on ionic metal salens of the type [N 2 O 2 M-X][NR 4 ] have been scarce, a neutral M-N 2 O 2 species as the starting point in the catalytic cycle.…”

Section: Proposed Mechanism Of the Coupling Reactionmentioning

confidence: 99%

Metal complexes bearing 2-(imidazol-2-yl)phenol ligands: synthesis, characterization and catalytic performance in the fixation of carbon dioxide with epoxides

2015

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A series of metal complexes bearing 2-(imidazol-2-yl)phenol ligands (Zn, Cu, Ni, Co, Pb) were synthesized and their structures were characterized by IR, NMR, elemental analysis and X-ray. The catalytical activities of all complexes for the coupling reaction of CO 2 and epoxide were then detected. The activity influence factors, such as temperature, time, pressure, substituents of ligands and metal 10 centre, were systematically investigated. All these complexes were efficient to catalyze the coupling of CO 2 and epoxide to generate cyclic carbonate in perfect yields (>90%) and selectivities (>99%) under optimized conditions of (2 MPa, 5 h, 110 °C) without any organic solvents. A 99.7% yield and >99% selectivity for propylene carbonate (PC) were obtained with C 7 /n-Bu 4 NI as catalyst system under the optimized conditions. The catalysts were also proved to be applicable to other terminal epoxides. It is 15 worthy noted that the Pb(II) complex was firstly used to catalyze the coupling reaction of epoxides with carbon dioxide. Moreover, these metal catalysts were recyclable with only minor losses in catalytic activity after simple separation. Finally, a plausible mechanism was given. 65 were distilled from CaH 2 .NMR spectra were recorded on a Bruker Al-400 MHz instrument using TMS as an internal standard. IR spectra were recorded on a Perkin-Elmer 2000 FT-IR spectrometer. Elemental analysis was conducted on a PE 2400 series II CHNS/O 70 elemental analyzer. Melting point was obtained from X-4-type digital micro-melting point apparatus. X-ray diffraction studies 65 each cycle, the catalyst C 1 could be easily separated from the product by the addition of ethanol, subsequent filtration and then used for the next run directly. The results in Fig. 5 exhibited that the catalyst C 1 could be reusable for at least 5 times without significant loss of activity, while the selectivity of the product 70 remained the same.

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Section: Proposed Mechanism Of the Coupling Reactionmentioning

confidence: 99%

Metal complexes bearing 2-(imidazol-2-yl)phenol ligands: synthesis, characterization and catalytic performance in the fixation of carbon dioxide with epoxides

2015

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“…69 The use of dichloromethane as a solvent was found to be essential for the reaction. With 1 mol% of both complex 30 and tetrabutylammonium bromide, 90% conversion of 3b to 4b was observed at 100 °C and 1 bar carbon dioxide pressure after 48 hours.…”

Section: Group Three Metal (Aluminium)mentioning

confidence: 99%

Sustainable metal-based catalysts for the synthesis of cyclic carbonates containing five-membered rings

et al. 2015

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“…Although utilization of CO 2 has potential to reduce greenhouse gas concentration in the atmosphere, the bottleneck for using CO 2 as a reactant is complex methodology owing to its significant chemical inertness [3]. Utilization of CO 2 for cyclic carbonate synthesis is advantageous as it is one of the targeted commodity chemicals and can be used as aprotic polar solvents, as an organic solvent in electrolytes for lithium ion batteries, precursor for polymers, intermediates in the production of pharmaceuticals and fine chemicals, etc.…”

Section: Introductionmentioning

confidence: 99%

Catalytic performance of imidazolium based ILs in the reaction of 1,2-epoxyoctane and carbon dioxide: Kinetic study

Jaiswal

Varma

2016

Journal of CO2 Utilization

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A single centre aluminium(iii) catalyst and TBAB as an ionic organo-catalyst for the homogeneous catalytic synthesis of styrene carbonate

Abstract: Cyclic carbonate synthesis from an epoxide is achieved by sparging CO2 at 1 bar into the solution using an aluminium/TBAB catalyst.

Cited by 84 publications

References 21 publications

Metal complexes bearing 2-(imidazol-2-yl)phenol ligands: synthesis, characterization and catalytic performance in the fixation of carbon dioxide with epoxides

Metal complexes bearing 2-(imidazol-2-yl)phenol ligands: synthesis, characterization and catalytic performance in the fixation of carbon dioxide with epoxides

Sustainable metal-based catalysts for the synthesis of cyclic carbonates containing five-membered rings

Catalytic performance of imidazolium based ILs in the reaction of 1,2-epoxyoctane and carbon dioxide: Kinetic study

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