Selective oxidation of bulky sulfides to sulfoxides over titanosilicates having an MWW structure in the presence of H2O2 under organic solvent-free conditions

Scaled‐up, selective and green synthesis of sulfoxides under mild conditions using (CeIII‐MoVI)Ox/aniline hybrid rods as an efficient catalyst

“…[15][16][17] Therefore, a large number of methods, procedures and oxidizing agents have been proposed for this type of transformation. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] Despite the fact that amines such as aniline, pyridine and … are not an appropriate catalyst for the oxidation reactions, they can effectively modify the catalytic activity of the molybdates and molybdenum oxides due to the electronic interactions between these amines and the active sites in the hybrid structures. However, majority of these traditional protocols rely on the use of hazardous terminal oxidants with low content of effective oxygen, and high cost which can generate hazardous by-products.…”

Selective and efficient catalytic and photocatalytic oxidation of diphenyl sulphide to sulfoxide and sulfone: the role of hydrogen peroxide and TiO2 polymorph

“…Recently, we described that the addition of tert-butyl alcohol (hydroxyl radical scavenger) signicantly diminishes the Ph 2 S conversion. 26 Furthermore, isotopic oxygen (H 2 18 O) experiments, reported by Li et al revealed that the oxygen atoms of sulfoxide (obtained photocatalytically from phenyl sulphide in water containing mixture, in the absence of H 2 O 2 ) originated mainly from water. 51 We concluded that hydroxyl radicals play a signicant role in the rst step of diphenyl sulphide oxidation, yielding Ph 2 SO.…”

“…15 SiO 2 -TiO 2 mesoporous xerogel catalyses oxidation to the nal product, diphenyl sulfone, with the selectivity of 85%. 16 Furthermore, it was conrmed that titanosilicate zeolites (inter alia, Ti-beta, 17 Ti-MWW, 18 Ti-FER, MTS-1 (ref. 19) and Ti-ITQ-6 (ref.…”

Fe3O4@BNPs@SiO2–SO3H as a highly chemoselective heterogeneous magnetic nanocatalyst for the oxidation of sulfides to sulfoxides or sulfones

“…9 Among possible oxidation pathways, the use of hydrogen peroxide for oxidation of suldes is more preferable 10 because it has several pros like low-price, secure storage, being readily accessible, and soluble in a large number of organic solvents as well as in water, and producing water as a green by-product. [11][12][13][14] In recent years, many catalysts including homogeneous and heterogeneous ones for oxidation of suldes have been announced. Although these methods have a lot of potential, the reactions suffer from low yields, long run times and poor catalyst recovery, and consume too much oxidant in comparison with substrates.…”