Polymer- and Carbon Nanotube-Supported Heterogeneous Catalysts for the Synthesis of Carbamates from Halides, Amines, and CO2

Tomasz Krawczyk; Katarzyna Jasiak; Aneta Kokolus; Stefan Baj

doi:10.1007/s10562-016-1738-1

Polymer- and Carbon Nanotube-Supported Heterogeneous Catalysts for the Synthesis of Carbamates from Halides, Amines, and CO₂

Tomasz Krawczyk
, Katarzyna Jasiak
, Aneta Kokolus
, Stefan Baj

Department of Chemical Organic Technology and Petrochemistry (RCH/RCH5)

Silesian University of Technology

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

13 Citations (Scopus)

Abstract

Abstract: A series of tetraalkylammonium catalysts immobilized on polystyrene or carbon nanotubes were investigated in a reaction between alkyl halides, amines, and CO₂. The yield of carbamates was up to 85 % at 100 °C and 1 MPa of CO₂ after 3 h (first stage 25 °C, 1 h) in the presence of Cs₂CO₃ and DMF as a solvent. The best results were achieved in the case of large ammonium substituents (C₄ and C₆) in the catalyst, benzyl amine, and benzyl chloride as reagents. The catalysts retained their activity after at least five cycles when carefully dried between cycles. Both polymer and carbon nanotube supports were equally effective, but the latter were less prone to deactivation. Graphical Abstract: [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	1163-1168
Number of pages	6
Journal	Catalysis Letters
Volume	146
Issue number	7
DOIs	https://doi.org/10.1007/s10562-016-1738-1
Publication status	Published - 1 Jul 2016

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

CO valorization
Immobilization
Nanoparticles

ASJC Scopus subject areas

Catalysis
General Chemistry

Access to Document

10.1007/s10562-016-1738-1

Cite this

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title = "Polymer- and Carbon Nanotube-Supported Heterogeneous Catalysts for the Synthesis of Carbamates from Halides, Amines, and CO2 ",

abstract = "Abstract: A series of tetraalkylammonium catalysts immobilized on polystyrene or carbon nanotubes were investigated in a reaction between alkyl halides, amines, and CO2. The yield of carbamates was up to 85 \% at 100 °C and 1 MPa of CO2 after 3 h (first stage 25 °C, 1 h) in the presence of Cs2CO3 and DMF as a solvent. The best results were achieved in the case of large ammonium substituents (C4 and C6) in the catalyst, benzyl amine, and benzyl chloride as reagents. The catalysts retained their activity after at least five cycles when carefully dried between cycles. Both polymer and carbon nanotube supports were equally effective, but the latter were less prone to deactivation. Graphical Abstract: [Figure not available: see fulltext.]",

keywords = "CO valorization, Immobilization, Nanoparticles",

author = "Tomasz Krawczyk and Katarzyna Jasiak and Aneta Kokolus and Stefan Baj",

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year = "2016",

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doi = "10.1007/s10562-016-1738-1",

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TY - JOUR

T1 - Polymer- and Carbon Nanotube-Supported Heterogeneous Catalysts for the Synthesis of Carbamates from Halides, Amines, and CO2

AU - Krawczyk, Tomasz

AU - Jasiak, Katarzyna

AU - Kokolus, Aneta

AU - Baj, Stefan

PY - 2016/7/1

Y1 - 2016/7/1

N2 - Abstract: A series of tetraalkylammonium catalysts immobilized on polystyrene or carbon nanotubes were investigated in a reaction between alkyl halides, amines, and CO2. The yield of carbamates was up to 85 % at 100 °C and 1 MPa of CO2 after 3 h (first stage 25 °C, 1 h) in the presence of Cs2CO3 and DMF as a solvent. The best results were achieved in the case of large ammonium substituents (C4 and C6) in the catalyst, benzyl amine, and benzyl chloride as reagents. The catalysts retained their activity after at least five cycles when carefully dried between cycles. Both polymer and carbon nanotube supports were equally effective, but the latter were less prone to deactivation. Graphical Abstract: [Figure not available: see fulltext.]

AB - Abstract: A series of tetraalkylammonium catalysts immobilized on polystyrene or carbon nanotubes were investigated in a reaction between alkyl halides, amines, and CO2. The yield of carbamates was up to 85 % at 100 °C and 1 MPa of CO2 after 3 h (first stage 25 °C, 1 h) in the presence of Cs2CO3 and DMF as a solvent. The best results were achieved in the case of large ammonium substituents (C4 and C6) in the catalyst, benzyl amine, and benzyl chloride as reagents. The catalysts retained their activity after at least five cycles when carefully dried between cycles. Both polymer and carbon nanotube supports were equally effective, but the latter were less prone to deactivation. Graphical Abstract: [Figure not available: see fulltext.]

KW - CO valorization

KW - Immobilization

KW - Nanoparticles

UR - https://www.scopus.com/pages/publications/84962921707

U2 - 10.1007/s10562-016-1738-1

DO - 10.1007/s10562-016-1738-1

M3 - Article

AN - SCOPUS:84962921707

SN - 1011-372X

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SP - 1163

EP - 1168

JO - Catalysis Letters

JF - Catalysis Letters

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