Sulfide Oxidation by Hydrogen Peroxide Catalyzed by Iron Complexes: Two Metal Centers Are Better Than One

Catalytic oxidation of alcohols and sulfides with hydrogen peroxide using isoindoline and phthalazine-based diiron complexes

“…The results of [Fe 2 (-O)(L 3,5,7 ) 2 Cl 2 ]-and [Fe 2 (-OMe) 2 (H 2 L 4,6,8 )Cl 4 ]-catalyzed thioanisole and benzyl alcohol oxidation showed that the best yields were obtained with complex 4 and 8, which are capable of catalyzing both oxygen-atom transfer and hydrogen-atom abstraction. Furthermore, detailed mechanistic experiments indicated the formation of an electrophilic metal-based oxidant in both systems, similarly that was found earlier for the [Fe 2 (-O)L 4 (H 2 O) 2 ] 4+ /H 2 O 2 (L = (-)-4,5-pinenebipyridine) system (Scheme 4) [48,49]. In case of 4, the oxidative reactivity may be explained by the formation of Fe III (-O)(-1,2-O 2 )Fe III , which is responsible for the formation of the key oxidant.…”

Iron-Catalyzed Enantioselective Reactions Through the Use of Chiral Bipyridine-Containing Ligands

“…[9,10] The diiron complex 1, whose structure has been corroborated by several spectroscopic techniques, efficiently catalyzes the oxidation of aryl sulfides to the corresponding sulfoxides by hydrogen peroxide, with yields ranging from 45 to 90 % based on the oxidant (Table 1). This sulfoxidation reaction is enantioselective, even though the level of selectivity is not high enough for preparative synthetic applications (4-40 % ee).…”

Recent Progress in the Selective Oxidation of Sulfides withHydrogen Peroxide

“…钛硅酸盐 TS-1 作为商品化的催化剂, 主要是 催化氧化小分子, 而 Ti-β 和钛孔材料可用于氧化大量硫 醚 [34] . [47] . Bolm 等 [48] 报道了原 位形成的 Fe-席夫碱配合物, 可以催化过氧化氢氧化硫 醚给出 S 构型的亚砜(Eq.…”