期刊
TETRAHEDRON LETTERS
卷 49, 期 20, 页码 3264-3267出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.03.073
关键词
spin probes; ESR spectroscopy; nitroxides; ionic liquids
A new synthetic way is described to prepare 4-trimethylammonio-2,2,6,6-tetramethylpiperidine-1-yloxyl bearing tetrafluoroborate, hexafluorophosphate or bis(trifluoromethylsulfonylimide) by an anion metathesis of 4-trimethylammonio-2,2,6,6-tetramethylpiperidine-1-yloxyl iodide using the corresponding silver salts. 4-Trimethylammonio-2,2,6,6-tetramethylpiperidine-1-yloxyl iodide is obtained by the methylation of 4-amino-2,2,6,6-tetramethylpiperidine-1-yloxyl with methyliodide. The new spin probe 4-trimethylammonio-2,2,6,6-tetramethylpiperidine-1-yloxyl bistrifluoromethylsulfonylimide and the spin probes containing tetrafluoroborate or hexafluorophosphate may be useful for an effective investigation of ionic liquids with similar anions. (c) 2008 Elsevier Ltd. All rights reserved.
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