A Novel Catalytic Method for the Oxidation of Sulfides to Sulfoxides with Silica Sulfuric Acid and Sodium Nitrite in the Presence of KBr and/or NaBr as Catalyst

Abstract

Highly efficient selective oxidation of sulfides to sulfoxides by NaNO 2 and silica sulfuric acid catalyzed with KBr or NaBr has been reported. This oxidation was carried out in the presence of wet SiO 2 (50% w/w) in acetonitrile at room temperature with good to excellent yields.

Preparation and characterization of functionalized Cu(II) Schiff base complex on mesoporous MCM-41 and its application as effective catalyst for the oxidation of sulfides and oxidative coupling of thiols

“…In continuation of our studies about application of new catalysts in organic transformations [20,21], we decided to prepare a novel heterogeneous catalyst. In this aim, immobilized Cu(II) Schiff base complex on MCM-41 was synthesized and applied for the oxidation of sulfides and oxidative coupling of thiols in the presence of urea hydrogen peroxide (UHP).…”

Metal-free oxidative coupling of thiols to disulfides using guanidinium nitrate or nitro urea in the presence of silica sulfuric acid

“…[18][19][20][21][22][23][24][25][26] In continuation of our investigation we became interested to delineate a new protocol to convert different types of thiols to the corresponding disulfides by guanidinium nitrate or nitro urea (figure 1) in the presence of silica sulfuric acid.…”

In situ generated hypoiodous acid in an efficient and heterogeneous catalytic system for the homo-oxidative coupling of thiols

“…In connection with an ongoing program related to the application of new reagents or reagent systems for organic functional group transformations, [29][30][31][32][33][34][35] the preparation of polyvinylpolypyrrolidone-supported hydrogen peroxide (PVPP-H 2 O 2 ) and its application to the synthesis of symmetrical disulfides from the corresponding thiols were considered of interest.…”