Ovian, John M. published the artcileAccessing N-Acyl Azoles via Oxoammonium Salt-Mediated Oxidative Amidation, Application of 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, the publication is Organic Letters (2017), 19(6), 1286-1289, database is CAplus and MEDLINE.
An operationally simple, robust, metal-free approach to the synthesis of N-acyl azoles from both alcs. and aldehydes is described. Oxidative amidation is facilitated by a com. available organic oxidant (4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate) and proceeds under very mild conditions for an array of structurally diverse substrates. Tandem reactions of these activated amides, such as transamidation and esterification, enable further elaboration. Also, the spent oxidant can be recovered and used to regenerate the oxoammonium salt.
Organic Letters 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