Nucleophile-directed selectivity towards linear carbonates in the niobium pentaethoxide-catalysed cycloaddition of CO2 and propylene oxide

Barnali Dutta; Julien Sofack-Kreutzer; Amylia A. Ghani; Valerio D'Elia; Jérémie D. A. Pelletier; Mirza Cokoja; Fritz E. Kühn; Jean-Marie Basset

doi:10.1039/C4CY00003J

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Nucleophile-directed selectivity towards linear carbonates in the niobium pentaethoxide-catalysed cycloaddition of CO₂ and propylene oxide†

Barnali Dutta,^a Julien Sofack-Kreutzer,^b Amylia A. Ghani,^ab Valerio D'Elia,*^b Jérémie D. A. Pelletier,^b Mirza Cokoja,^a Fritz E. Kühn*^a and Jean-Marie Basset^b

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* Corresponding authors

^a Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Technische Universität München, Ernst-Otto-Fischer-Straße 1, D-85747 Garching bei München, Germany
E-mail: fritz.kuehn@ch.tum.de
Fax: +49 89 289 13473
Tel: +49 89 289 13096

^b KAUST Catalysis Centre, King Abdullah University of Science and Technology, Thuwal, Kingdom Saudi Arabia
E-mail: valerio.delia@kaust.edu.sa

Abstract

Homoleptic Nb-complexes combined with selected organic nucleophiles generate very active catalytic systems for the cycloaddition of propylene oxide and CO₂ under ambient conditions. An unprecedented reaction pathway towards an acyclic organic carbonate is observed when extending the study to [Nb(OEt)₅] in combination with 4-dimethylamino-pyridine (DMAP) or tetra-n-butylammonium bromide (TBAB). Mechanistic insights of the reaction are provided based on experimental and spectroscopic evidences.

This article is part of the themed collection: Carbon dioxide conversion

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DOI: https://doi.org/10.1039/C4CY00003J
Article type: Communication
Submitted: 02 Jan 2014
Accepted: 01 Mar 2014
First published: 03 Mar 2014

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Catal. Sci. Technol., 2014,4, 1534-1538

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Nucleophile-directed selectivity towards linear carbonates in the niobium pentaethoxide-catalysed cycloaddition of CO₂ and propylene oxide

B. Dutta, J. Sofack-Kreutzer, A. A. Ghani, V. D'Elia, J. D. A. Pelletier, M. Cokoja, F. E. Kühn and J. Basset, Catal. Sci. Technol., 2014, 4, 1534 DOI: 10.1039/C4CY00003J

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