Bridge-functionalized bisimidazolium bromides as catalysts for the conversion of epoxides to cyclic carbonates with CO2

Yuanhui Li; Bruno Dominelli; Robert M. Reich; Boping Liu; Fritz E. Kühn

doi:10.1016/j.catcom.2019.03.012

Bridge-functionalized bisimidazolium bromides as catalysts for the conversion of epoxides to cyclic carbonates with CO₂

Yuanhui Li, Bruno Dominelli, Robert M. Reich, Boping Liu, Fritz E. Kühn

Associate Professorship of Molecular Catalysis

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Six novel bridge-functionalized bisimidazolium bromides have been synthesized for the catalytic cycloaddition of CO₂ (70 °C, 0.4 MPa CO₂). Additionally, the influence of the hydrogen-bond donors, the N-wing-tip-substituents and the chain length of the connecting carbon bridges on the catalytic activity were studied. A COOH-functionalized catalyst with mesityl N-substituents and a C3‑carbon bridge 6 (Scheme 1) proves to be slightly more active than the reference catalyst 9^ref for the addition of carbon dioxide to various epoxides, and can be analogously recycled from propylene carbonate (PC) for at least six times without distinct loss of activity.

Original language	English
Pages (from-to)	118-122
Number of pages	5
Journal	Catalysis Communications
Volume	124
DOIs	https://doi.org/10.1016/j.catcom.2019.03.012
State	Published - 5 May 2019

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title = "Bridge-functionalized bisimidazolium bromides as catalysts for the conversion of epoxides to cyclic carbonates with CO2",

abstract = "Six novel bridge-functionalized bisimidazolium bromides have been synthesized for the catalytic cycloaddition of CO2 (70 °C, 0.4 MPa CO2). Additionally, the influence of the hydrogen-bond donors, the N-wing-tip-substituents and the chain length of the connecting carbon bridges on the catalytic activity were studied. A COOH-functionalized catalyst with mesityl N-substituents and a C3‑carbon bridge 6 (Scheme 1) proves to be slightly more active than the reference catalyst 9ref for the addition of carbon dioxide to various epoxides, and can be analogously recycled from propylene carbonate (PC) for at least six times without distinct loss of activity.",

author = "Yuanhui Li and Bruno Dominelli and Reich, {Robert M.} and Boping Liu and K{\"u}hn, {Fritz E.}",

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doi = "10.1016/j.catcom.2019.03.012",

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T1 - Bridge-functionalized bisimidazolium bromides as catalysts for the conversion of epoxides to cyclic carbonates with CO2

AU - Li, Yuanhui

AU - Dominelli, Bruno

AU - Reich, Robert M.

AU - Liu, Boping

AU - Kühn, Fritz E.

PY - 2019/5/5

Y1 - 2019/5/5

N2 - Six novel bridge-functionalized bisimidazolium bromides have been synthesized for the catalytic cycloaddition of CO2 (70 °C, 0.4 MPa CO2). Additionally, the influence of the hydrogen-bond donors, the N-wing-tip-substituents and the chain length of the connecting carbon bridges on the catalytic activity were studied. A COOH-functionalized catalyst with mesityl N-substituents and a C3‑carbon bridge 6 (Scheme 1) proves to be slightly more active than the reference catalyst 9ref for the addition of carbon dioxide to various epoxides, and can be analogously recycled from propylene carbonate (PC) for at least six times without distinct loss of activity.

AB - Six novel bridge-functionalized bisimidazolium bromides have been synthesized for the catalytic cycloaddition of CO2 (70 °C, 0.4 MPa CO2). Additionally, the influence of the hydrogen-bond donors, the N-wing-tip-substituents and the chain length of the connecting carbon bridges on the catalytic activity were studied. A COOH-functionalized catalyst with mesityl N-substituents and a C3‑carbon bridge 6 (Scheme 1) proves to be slightly more active than the reference catalyst 9ref for the addition of carbon dioxide to various epoxides, and can be analogously recycled from propylene carbonate (PC) for at least six times without distinct loss of activity.

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SP - 118

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JO - Catalysis Communications

JF - Catalysis Communications

ER -

Bridge-functionalized bisimidazolium bromides as catalysts for the conversion of epoxides to cyclic carbonates with CO₂

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