Fang, Li published the artcileA Metal-Free Oxidative Cross-Dehydrogenative Coupling of N-Aryl Tetrahydroisoquinolines and 2-Methylazaarenes Using a Recyclable Oxoammonium Salt as Oxidant in Aqueous Media, Related Products of piperidines, the publication is European Journal of Organic Chemistry (2016), 2016(21), 3559-3567, database is CAplus.
A metal-free oxidative cross-dehydrogenative coupling of N-aryl tetrahydroisoquinolines and 2-methylazaarenes in water under mild conditions was developed. 4-Acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate was employed as a mild oxidant that can be recovered and reused directly. The reaction proceeds through formation of an iminium ion in situ followed by condensation with various nucleophiles, providing the desired products in moderate to good yields.
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, Related Products of piperidines.
Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem