Hamlin, Trevor A. published the artcileDehydrogenation of Perfluoroalkyl Ketones by Using a Recyclable Oxoammonium Salt, Application of 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, the publication is European Journal of Organic Chemistry (2013), 2013(18), 3658-3661, database is CAplus.
A novel dehydrogenation reaction of perfluoroalkyl ketones by the oxoammonium salt 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate (4-NHAc-TEMPO+ BF4–, Bobbitt’s salt) is described. The reaction proceeds under mildly basic conditions and appears to be unique to perfluoroalkyl ketones. E.g., in presence of Bobbitt’s salt and 2,6-lutidine in refluxing CH2Cl2, dehydrogenation of PhCH2CH2COCF3 gave 65% (E)-I. A proposed mechanism for this unusual transformation is given. The byproduct of the reaction, 4-acetylamino-2,2,6,6-tetramethyl-1-piperidinyloxy, can easily be recovered and used to regenerate the oxoammonium salt.
European Journal of Organic Chemistry published new progress about 219543-09-6. 219543-09-6 belongs to piperidines, auxiliary class Piperidine,Fluoride,Salt,Amine,Amide, name is 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, and the molecular formula is C11H21BF4N2O2, Application of 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate.
Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem