Liao, Lihao published the artcileSelenium-π-Acid Catalyzed Oxidative Functionalization of Alkynes: Facile Access to Ynones and Multisubstituted Oxazoles, Application In Synthesis of 107263-95-6, the publication is ACS Catalysis (2018), 8(7), 6745-6750, database is CAplus.
In the presence of di-Ph diselenide, N-fluoropyridinium triflates, and water, propargyl phosphonates such as PhCCCH2P(:O)(OEt)2 and β,γ-alkynoates underwent regioselective oxidation to yield γ-ketoalkynyl phosphonates such as PhCOCCP(:O)(OEt)2 and γ-keto-α,β-alkynoates. Ynamides such as PhCCN(CH2Ph)R (R = MeSO2, PhSO2, 4-MeC6H4SO2, 4-O2NC6H4) underwent regioselective oxidative cycloadditions with acetonitrile or butanenitrile mediated by Selectfluor in the presence of di-Ph selenide to yield aminooxazoles such as I (R = MeSO2, PhSO2, 4-MeC6H4SO2, 4-O2NC6H4). N-Propargylamides underwent oxidative cyclization in the presence of di-Ph diselenide and mediated by Selectfluor to give 2-substituted-5-oxazolecarboxaldehydes. In all cases, the reactions are likely to involve the reactions of cationic phenylselenium species with alkynes to generate vinylselenium cations. The mechanism of the reactions were studied; vinyl selenides were prepared by reactions of phenylselenium triflate with propargyl phosphonates and ynamides and shown to yield the observed ketone and oxazole products upon elimination, while isotopic labeling experiments were undertaken to determine the fate of added water.
ACS Catalysis published new progress about 107263-95-6. 107263-95-6 belongs to pyridine-derivatives, auxiliary class Fluorination reagent, name is 1-Fluoropyridiniumtriflate, and the molecular formula is C6H5F4NO3S, Application In Synthesis of 107263-95-6.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem