104548-30-3Relevant articles and documents
Catalytic epoxidation of cis-stilbene and naphthalene by tetra-n-butylammonium hydrogen monopersulfate in the presence of manganese(III) tetraarylporphyrins and various anionic co-catalysts
Solati, Zahra,Hashemi, Majid,Keshavarzi, Ahmad,Rafiee, Ezzat
, p. 149 - 153 (2012)
The epoxidation of cis-stilbene by n-Bu4NHSO5 was studied in the presence of two different manganese porphyrin complexes, [MnTPFPP(Cl) and MnTPP(Cl)], and various n-Bu4NX (X = OAc, F, Cl, Br, OCN, NO3, BF4). In general direct correlation was found between stereoselectivity of the epoxidation reaction and the nucleophilic properties of these anionic co-catalysts. Also epoxidation of naphthalene was carried out in high yield and good selectivity by n-Bu4NHSO 5 in the presence of MnTPFPP(Cl) in association with n-Bu 4NOAc or n-Bu4NF co-catalysts.
Effects of methoxy-substituted metalloporphyrins in catalytic alkene epoxidation by n-Bu 4NHSO 5
Aghabali, Amineh,Safari, Nasser
body text, p. 335 - 342 (2010/11/21)
TPPMnOAc and four different kinds of manganese tetraphenylporphyrin acetates were synthesized using different numbers of methoxy substituents in various positions of the phenyl rings. These porphyrins were used as catalysts in the epoxidation of various alkenes with tetra-n-butylammonium hydrogen monopersulfate (n-Bu 4NHSO 5) as the oxidant and imidazole as the axial base. The following order of catalytic activity was obtained: TPPMnOAc ≥ T(2,3-OMeP) PMnOAc > T(4-OMeP) PMnOAc > T(3,4-OMeP) PMnOAc > T(2,4,6-OMeP) PMnOAc. By studying the UV-vis spectra in the reaction solution, the stability of the applied methoxy porphyrins and the effect of this factor on obtained yields were investigated. Lower catalytic activity in some of the methoxy porphyrins emphasized steric effects and special hydrogen bonding among the reaction elements. However, the stability of T(2,3-OMeP) PMnOAc under our reaction condition was considerable and high activity was observed. By adding small amounts of alcohol to the reaction solution, the effect of the solvent mixture was previewed and steps were taken to identify the active intermediate of the catalyst in these conditions. Copyright
Tetra-n-butylammonium Oxone. Oxidations under Anhydrous Conditions
Trost, Barry M.,Braslau, Rebecca
, p. 532 - 537 (2007/10/02)
Tetra-n-butylammonium Oxone, readily prepared as a white solid from commercially available Oxone, performs oxidations in anhydrous methylene chloride.Under these conditions, sulfides are oxidized to sulfones in the presence of amines, ketones, esters, car