Surface-mediated oxone

Oxone, which is commercially available as a 2 1 1 mixture of KHSO5, KHSO4, and K2SO4, has been used for the oxidation of sulfides to sulfoxides [15]. It shows a tendency to overoxidation, and was originally used for the oxidation of sulfides to sulfones [16]. More recently, some improvements were obtained with surface-mediated oxone oxidations, the oxone being bound to a silica gel surface (Eq. (8.3)). However, some sulfone was still formed. 

Oxidation of sulfides and sulfoxides using Oxone dispersed on silica gel or alumina was reported . A study of surface mediated reactivity of Oxone compared its reactivity with that of ferf-butyl hydroperoxide. Oxidation of sulfides to sulfones in aprotic solvents mediated by Oxone on wet montmorillonite or clay minerals proceeds in high yields. Interestingly, when Oxone on alumina is applied for selective oxidation of sulfides in aprotic solvents, the product distribution is temperature-dependent and sulfoxides or sulfones are obtained in good to excellent yields (equation 56) . ... 

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See also in sourсe #XX -- [ ]

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