Martínez, Javier, Castro-Osma, José A. orcid.org/0000-0002-5029-0507, Alonso-Moreno, Carlos et al. (4 more authors) (2016) One-Component Aluminum(heteroscorpionate) Catalysts for the Formation of Cyclic Carbonates from Epoxides and Carbon Dioxide. ChemSusChem. ISSN 1864-564X
Abstract
New neutral and zwitterionic chiral NNO-donor scorpionate ligands 1 and 2 were designed to obtain new mononuclear and dinuclear NNO-heteroscorpionate aluminum complexes. Reaction of 1 with [AlR3] (R=Me, Et) in a 1:1 or 1:2 molar ratio afforded the neutral mononuclear alkyl complexes [AlR2(κ2-bpzappe)] (R=Me (3), Et (4); bpzappeH=2,2-bis(3,5-dimethylpyrazol-1-yl)-1-[4-(dimethylamino)phenyl]-1-phenylethanol) and bimetallic complexes [(AlR2(κ2-bpzappe))(μ-O)(AlR3)] [R=Me (5), Et (6)]. By reaction of complexes 3-6 with PhCH2Br, mononuclear and dinuclear cationic aluminum complexes [AlR2(κ2-bbpzappe)]Br (R=Me (7), Et (8); bbpzappeH=N-benzyl-4-[2,2-bis(3,5-dimethyl-1H-pyrazol-1-yl)-1-hydroxy-1-phenylethyl]-N,N-dimethylbenzenaminium bromide) and [(AlR2(κ2-bbpzappe))(μ-O)(AlR3)]Br [R=Me (9), Et (10)] were synthesized. Both neutral aluminum complexes in the presence of Bu4NBr and cationic aluminum complexes were investigated as catalysts for cyclic carbonate formation from epoxides and carbon dioxide. Amongst them, complex10 was found to be an efficient one-component catalyst for the synthesis of cyclic carbonates from both monosubstituted and internal epoxides and was shown to have broad substrate scope.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, Wiley. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Keywords: | Aluminum,Carbon dioxide fixation,Cyclic carbonates,Epoxides,Sustainable chemistry |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 18 Jan 2017 10:50 |
Last Modified: | 16 Oct 2024 13:31 |
Published Version: | https://doi.org/10.1002/cssc.201601370 |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1002/cssc.201601370 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110763 |