Selective oxidation of sulfides to sulfoxides catalyzed by ruthenium (III) meso-tetraphenylporphyrin chloride in the presence of molecular oxygen

Biomimetic kinetics and mechanism of cyclohexene epoxidation catalyzed by metalloporphyrins

“…However, in the presence of metalloporphyrins catalyst, all the reactions proceeded with high conversions and selectivity for the desired cyclohexene epoxide (entries 1-4). Comparing the catalytic activities of different porphyrin catalysts, it was found that manganese porphyrin was the most effective since cyclohexene could be completely converted within 4.0 h. Ruthenium porphyrin presented the lowest catalytic performance although it favored for the oxidation of thioanisole [31]. The catalytic activity of different metalloporphyrins is probably influenced by their electric potential and the stability of different valences of metal atoms.…”

“…In the previous studies, the simple structural metalloporphyins exhibited high catalytic performance for oxidation of alkanes, sulfides and alcohols by molecular oxygen [30][31][32][33]. Highly efficient aerobic epoxidation of olefins catalyzed by manganese porphyrin/isobutyraldehyde under mild conditions has ever reported [34].…”

Biomimetic Homogeneous Oxidation Catalyzed by Metalloporphyrins with Green Oxidants

“…101 Highly efficient selective oxidation of sulfides to sulfoxides by molecular oxygen catalyzed by ruthenium (III) meso-tetraphenylporphyrin chloride (Ru(TPP)Cl) with isobutryaldehyde as oxygen acceptor has been reported by our group. 102 In large-scale experiment of thioanisole oxidation, the isolated yield of sulfoxide of 92% was obtained and the turnover number reached up to 92000 (Scheme 17). It can be observed that the electronic property of substrate affects the reaction rate (entries 1~4).…”

Chromium (III) Catalyzed Selective Oxidation of Sulfides to Sulfoxides Using 30% H2O2

“…Oxidation of sulfide is the simplest, straight and widely accepted for their synthesis. Various reagents and oxidative procedures are now available for their transformations [9][10][11][12][13][14][15][16][17]. But most of these reagents are not satisfactory for synthesis because of low content of effective oxygen, high cost and formation of unfavorable waste by-products.…”