2008
DOI: 10.1016/j.tetlet.2007.11.183
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A novel reagent combination for the oxidation of highly electron deficient pyridines to N-oxides: trifluoromethanesulfonic anhydride/sodium percarbonate

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Cited by 36 publications
(12 citation statements)
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“…Over years a multitude number of Pyridine N‐ oxides have been prepared due to their widespread applications as synthetic intermediates, in agrochemicals, and also in drug discovery programs . Furthermore, heterocyclic PNOs have attracted tremendous attention for their various promises as protecting agents, auxiliary agents, oxidants, ligands in metal complexes and catalysts .…”
Section: Oxidation Of Pyridines To N‐oxides (Scheme Entry 10)mentioning
confidence: 99%
“…Over years a multitude number of Pyridine N‐ oxides have been prepared due to their widespread applications as synthetic intermediates, in agrochemicals, and also in drug discovery programs . Furthermore, heterocyclic PNOs have attracted tremendous attention for their various promises as protecting agents, auxiliary agents, oxidants, ligands in metal complexes and catalysts .…”
Section: Oxidation Of Pyridines To N‐oxides (Scheme Entry 10)mentioning
confidence: 99%
“…12,33 As alternative oxidants with similar oxidation capacities to hydrogen peroxide, SPC and SPB have been considered as potential replacements for hydrogen peroxide because they are much safer to handle and behave as a source of hydrogen peroxide if dissolved in water. 33,34 Moreover, SPC can produce more oxygen and demonstrates a higher solubility at room temperature, and does not introduce any additional potentially harmful by-products into the aqueous system. 35 Besides, SPS can be activated in Fenton's reaction to generate free sulphate radicals (SO ⋅− 4 ) with a high oxidation potential (E 0 = 2.6 V), which is comparable to that of • OH (E 0 = 2.7 V).…”
Section: Introductionmentioning
confidence: 99%
“…In an effort to develp alternative synthetic routes and minimize the waste production of the Noxidation process, research groups promoted the Noxidation of pyridines using homogeneous catalysts including AcOH/H2O2, [11] MeReO3/H2O2, [12] trifluoroacetic anhydride (TFAA)/H2O2 [13] and Tf2O/Na2CO3·1.5H2O2. [14] Unfortunately, these homogeneous catalysts are not recyclable, which largely restrict their application in practice. In order to overcome such problems, a number of heterogeneous catalysts including VxSi4xO6.4x, [15] GrO-MTO, [16] Ru(PVP)/c-Al2O3 [17] and Ti-MWW [18] were applied to the N-oxidation of pyridines.…”
Section: Introductionmentioning
confidence: 99%