Selective oxidation of sulfides to sulfoxides by a molybdate-based catalyst using 30% hydrogen peroxide

Oxodiperoxomolybdenum complex immobilized onto ionic liquid modified SBA-15 as an effective catalysis for sulfide oxidation to sulfoxides using hydrogen peroxide

“…For example, the methylphenylsulfide substrate (entry 2) was oxidized to the corresponding sulfoxide with similar conversion and selectivity that related peroxotungstate species on SBA-15 [55] or on SILP [31]. Also, the activity of molybdate immobilized in a magnetic nanoparticle coated by functionalized silica is comparable to our results and, for instance, 4-chlorothioanisole was oxidized for such a system in 4.5 h with 92% of conversion [54]. Remarkably, in all the cases shown in Table 3 the selectivity to sulfoxide is higher than those observed in the study of the same process carried out in [C 4 [41].…”

“…The presence of the molybdenum species was crucial for achieving good conversions (higher than 80%, entry 4) as was demonstrated with the Mo-impregnated material, SBA-15 + MoO5 (entry 4) [51][52][53]. This result is comparable with a related system in which molybdate was immobilized in a magnetic nanoparticle coated by a functionalized silica [54]. The best catalyst/solvent combination of Table 2 was the use of the SBA-15 + ImCl + MoO5 catalyst with methanol as solvent (entry 8).…”

Silver nanoparticles immobilized onto poly(4‐vinylpyridine)‐functionalized magnetic nanoparticles: A robust magnetically recyclable catalyst for oxidant‐free alcohol dehydrogenation

“…First, Fe 3 O 4 magnetic nanoparticles (MNPs) were synthesized using a co‐precipitation method under the basic condition according to our previous works . A solution of FeCl 2 ⋅4H 2 O (1.8 g, 0.0089 mol) and FeCl 3 ⋅6H 2 O (4.8 g, 0.018 mol) was vigorously stirred (700 rpm) in deionized water (100 ml) under argon atmosphere.…”

Preparation and Characterization of Organically Modified MCM-48 as Heterogonous Catalyst for Oxidation of Sulfides and Thiols

“…Many reagents are used for the oxidation of sulfides such as nitric acid, KMnO 4 , m-chloroperbenzoic acid, sodium metaperiodate, hydrogen peroxide, sulfinyl peroxy compounds, 4-methylmorpholine n-oxide/osmium tetroxide, peroxotungstate complexes [21], MeNO 2 solution in dilute HNO 3 /H 2 SO 4 [22] and etc. In recent years, a considerable number of methods have been reported for the oxidation of sulfides to sulfoxides using H 2 O 2 in combination with, V/TiO 2 [23], Cerium(IV) triflate [24], molybdate-based catalyst [25], metalloporphyrins immobilized into montmorillonite [26], Zn complex [27], Cu Salen-Fe 3 O 4 [28], Copper(II) Schiff base complex [29], pre-formed manganese complex [30], tantalum(V) chloride [31] and zirconium tetrachloride [32].…”