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Synthesis of 4-trimethylammonio-2,2,6,6-tetramethylpiperidine-1-yloxyl with various anions for investigation of ionic liquids

✍ Scribed by Veronika Strehmel; Hans Rexhausen; Peter Strauch

Publisher: Elsevier Science
Year: 2008
Tongue: French
Weight: 117 KB
Volume: 49
Category: Article
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2008.03.073

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✦ Synopsis

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.

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