2021
DOI: 10.1039/d1nj03332h
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Sulfur-containing amino acid-derived ionic liquid as a halogen-free catalyst for CO2 mild transformation into cyclic carbonates

Abstract: In this work, a novel, easily-prepared and stable acid derived ionic liquid [DBUH]2[Cys] containing –S- anion was synthesized and used to catalyze the reactions of CO2 and epoxides. It was...

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Cited by 16 publications
(12 citation statements)
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“…When the amount of P1 was 2 mol% of ethylene oxide, the yield reached 91% at 60 °C/2 MPa. Although there was still a certain gap as compared with some reported porous heterogeneous catalysts that can achieve low temperature and low pressure, 23–25 P1 showed good catalytic performance as compared with the previously reported ionic liquids and polyionic liquids, as shown in Table S2 † 16,26–34 . Different from liquid ethylene oxide, the nucleoside substrate is solid, and the polyionic liquid does not dissolve the substrate and cannot be used as a solvent.…”
Section: Resultsmentioning
confidence: 87%
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“…When the amount of P1 was 2 mol% of ethylene oxide, the yield reached 91% at 60 °C/2 MPa. Although there was still a certain gap as compared with some reported porous heterogeneous catalysts that can achieve low temperature and low pressure, 23–25 P1 showed good catalytic performance as compared with the previously reported ionic liquids and polyionic liquids, as shown in Table S2 † 16,26–34 . Different from liquid ethylene oxide, the nucleoside substrate is solid, and the polyionic liquid does not dissolve the substrate and cannot be used as a solvent.…”
Section: Resultsmentioning
confidence: 87%
“…Although there was still a certain gap as compared with some reported porous heterogeneous catalysts that can achieve low temperature and low pressure, [23][24][25] P1 showed good catalytic performance as compared with the previously reported ionic liquids and polyionic liquids, as shown in Table S2. † 16,[26][27][28][29][30][31][32][33][34] Different from liquid ethylene oxide, the nucleoside substrate is solid, and the polyionic liquid does not dissolve the substrate and cannot be used as a solvent. However, polyionic liquid can effectively synthesize nucleoside cyclic carbonate without adding any solvent and cocatalyst.…”
Section: Catalytic Evaluation Of Pils and Ilsmentioning
confidence: 99%
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“…However, CO 2 can be used as a non-toxic, cheap, easily available, and abundant C1 resource for constructing C-C, C-N, and C-O bonds to produce high-value chemicals such as carboxylic acids, oxazolidinones, urea, isocyanates, cyclic carbonates, etc. [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. The synthesis of cyclic carbonates using carbon dioxide has been extensively studied.…”
Section: Introductionmentioning
confidence: 99%
“…[4][5][6][7] One of the most effective methods is to convert carbon dioxide and epoxides into the corresponding cyclic carbonates, because this reaction can not only achieve 100% atom utilization but also the resulting cyclic carbonates can be used as important chemical intermediates to synthesize specialty fine chemicals. [8][9][10][11][12][13] Various heterogeneous and homogeneous catalysts, including metal oxides, 14,15 molecular sieves, [16][17][18][19][20] transition metal complexes, [21][22][23][24][25] alkali metal salts, 26,27 quaternary ammonium salts, [28][29][30] metal-organic frameworks, [31][32][33][34][35] Lewis acids or bases, [36][37][38] and various ionic liquids, [39][40][41][42][43][44][45][46][47][48][49] have been utilized to catalyze cycloaddition reactions. However, mo...…”
Section: Introductionmentioning
confidence: 99%