TY  - JOUR
A1  - Strehmel, Veronika
A1  - Rexhausen, Hans
A1  - Strauch, Peter
T1  - New spin probes starting from 4-amino-2,2,6,6-tetramethylpiperidine-1-yloxyl
JF  - Tetrahedron letters
N2  - This Letter describes four new 4-trimethylammonio-2,2,6,6-tetramethylpiperidine-1-yloxyls bearing camphorsulfonate, triflate, tosylate, or lactate as counter ions. These spin probes were made by anion metathesis of 4-trimethylammonio-2,2,6,6-tetramethylpiperidine-1-yloxyl iodide using the corresponding silver salts. The latter is made by the alkylation of 4-amino-2,2,6,6-tetramethylpiperidine-1-yloxyl. Furthermore, the Letter gives an improved synthetic way to 4-sulfonamido-2,2,6,6-tetramethylpiperidine-1-yloxyl using chlorosulfuric acid trimethylsilylester and 4-amino-2,2,6,6-tetramethylpiperidine-1-yloxyl. All the spin probes are highly interesting for the investigation of ionic liquids.
KW  - Nitroxides
KW  - Spin probes
KW  - ESR spectroscopy
KW  - Ionic liquids
Y1  - 2012
U6  - https://doi.org/10.1016/j.tetlet.2012.01.063
SN  - 0040-4039
VL  - 53
IS  - 13
SP  - 1587
EP  - 1591
PB  - Elsevier
CY  - Oxford
ER  -