Biswas, Souvagya published the artcileEnantioselective Synthesis of N,S-Acetals by an Oxidative Pummerer-Type Transformation using Phase-Transfer Catalysis, COA of Formula: C11H21BF4N2O2, the publication is Angewandte Chemie, International Edition (2018), 57(2), 589-593, database is CAplus and MEDLINE.
Reported is the first enantioselective oxidative Pummerer-type transformation using phase-transfer catalysis to deliver enantioenriched sulfur-bearing heterocycles. This reaction includes the direct oxidation of sulfides to a thionium intermediate, followed by an asym. intramol. nucleophilic addition to form chiral cyclic N,S-acetals with moderate to high enantioselectivities. Deuterium-labeling experiments were performed to identify the stereodiscrimination step of this process. Further anal. of the reaction transition states, by multidimensional correlations and DFT calculations, highlight the existence of a set of weak noncovalent interactions between the catalyst and substrate that govern the enantioselectivity of the reaction.
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, COA of Formula: C11H21BF4N2O2.
Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem