Richter, Heinrich published the artcileMild Metal-Free Tandem α-Alkylation/Cyclization of N-Benzyl Carbamates with Simple Olefins, Computed Properties of 219543-09-6, the publication is Angewandte Chemie, International Edition (2012), 51(34), 8656-8660, S8656/1-S8656/82, database is CAplus and MEDLINE.
Stereoselective synthesis of oxazines was achieved by metal-free tandem α-alkylation/cyclization of N-benzyl carbamates with olefins. E.g., in presence of TEMPO derivative (I) as oxidant, α-alkylation/cyclization of carbamate II (Ad = 1-adamantyl) gave a mixture of separable diastereomers 77% III and 16% IV.
Angewandte Chemie, International Edition 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, Computed Properties of 219543-09-6.
Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem