期刊
RSC ADVANCES
卷 4, 期 44, 页码 23327-23337出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra03226h
关键词
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资金
- Australian Research Council
High yield and purity heterocyclic ionic liquids can be obtained via the microwave irradiation of equimolar amounts of a secondary amine and of an alpha,omega-dibromoalkane (i.e., 1,4-dibromobutane, 1,5-dibromopentane, bis(2-bromoethyl) ether, or alpha,alpha'-dibromo-o-xylene) in water, in the presence of potassium carbonate, followed by anion exchange with lithium bis(trifluoromethanesulfonyl) imide, affording pyrrolidinum, piperidinium and morpholinium ionic liquids, respectively. Using this methodology, a large number of homologous ionic liquids can be prepared from a small number of readily available and relatively cheap starting materials, including a new class of ionic liquids based on the 2,3-dihydro-1H-isoindolinium ring system. Analysis (using SWOT and the GSK greenness assessments) of this synthetic method and comparison with current literature preparations reveals that this new method delivers significant benefits across a range of relevant parameters.
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