METHOD FOR MANUFACTURING AN EPOXY COMPOUND AND METHOD FOR EPOXIDIZING A CARBON-CARBON DOUBLE BOND
申请人:Takumi Kiyoshi
公开号:US20120108830A1
公开(公告)日:2012-05-03
The present invention provides a method for producing an epoxy compound, comprising oxidizing a carbon-carbon double bond of an organic compound by hydrogen peroxide in the presence of a neutral inorganic salt and a mixed catalyst of a tungsten compound (a), at least one phosphorus compound selected from the group consisting of phosphoric acids, phosphonic acids, and salts thereof (b) and a surfactant (c), and an epoxidizing method comprising oxidizing a carbon-carbon double bond by hydrogen peroxide in the presence of the catalyst and the neutral inorganic salt.
[EN] NOVEL PHOSPHOROUS (V)-BASED REAGENTS, PROCESSES FOR THE PREPARATION THEREOF, AND THEIR USE IN MAKING STEREO-DEFINED ORGANOPHOSHOROUS (V) COMPOUNDS<br/>[FR] NOUVEAUX RÉACTIFS À BASE DE PHOSPHORE (V), LEURS PROCÉDÉS DE PRÉPARATION ET LEUR UTILISATION DANS LA FABRICATION DE COMPOSÉS ORGANOPHOSHOREUX (V) STÉRÉODÉFINIS
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2019200273A1
公开(公告)日:2019-10-17
The present invention relates to novel phosphorous (V) (P(V)) reagents, methods for preparing thereof, and methods for preparing organophosphorous (V) compounds by using the novel reagents.
Sulfonated manganese(III) tetraphenylporphyrin supported on Amberlite IRA-400 ion-exchange resin (MnTPPS-Ad), can act as an efficient heterogeneous catalyst for alkeneepoxidation and alkane hydroxylation by sodium periodate in the presence of imadazole.
Cobalt catalyzed oxidation of cyclic alkenes with molecular oxygen: Allylic oxidation versus double bond attack
作者:M. Madhava Reddy、T. Punniyamurthy、Javed Iqbal
DOI:10.1016/0040-4039(94)02200-u
日期:1995.1
Schiff's base complex 1 and 2 exhibit a remarkable chemoselectivity during oxidation of cyclic alkenes with molecularoxygen in the presence of 2- methylpropanal. Catalyst 1 encourages the oxidation of double bond to give epoxide as the major product whereas catalyst 2 promotes mainly the allylicoxidation leading to allylic alcohols or enones.
Mechanistic studies on the epoxidation of alkenes with molecular oxygen and aldehydes catalysed by transition metal–β-diketonate complexes
作者:Bastienne B. Wentzel、Patricia A. Gosling、Martin C. Feiters、Roeland J. M. Nolte
DOI:10.1039/a801175c
日期:——
The scope, mechanism and kinetics of the aerobic epoxidation of alkenes with an aldehyde and substituted β-diketonateâtransition metal complexes as catalysts were studied. β-Diketonate complexes of nickel(II) proved to be among the best catalysts for this reaction. The epoxidation is not dependent on substrate concentration and is first order in aldehyde, catalyst concentration and oxygen partial pressure. It was shown by reactivity studies and EPR experiments that the reaction is radical in nature. Additional evidence for this was obtained from stereochemical investigations. The metal catalyst is not only an efficient initiator of the reaction, but is also believed to enhance the reactivity of intermediate species in the oxidation process by allowing these to co-ordinate to the metal center. A mechanism is proposed for the catalytic reaction.