Shigetaka Yakabe

Manganese(III)-Catalysed Oxidation of Sulphides with Sodium Chlorite in an Aprotic Solvent in the Presence of Alumina

Abstract A wide variety of sulphides can be readily converted to the corresponding sulphoxides in good to excellent yields by treatment with a combination of sodium chlorite, (salen)manganese(III) complex, and chromatographic alumina in dichloromethane under mild and neutral conditions.

An Environmentally Friendly Oxidation of Thiols to Disulfides by Calcium Hypochlorite and Montmorillonite K10 in Hexane

Abstract — Aromatic, aliphatic, and alicyclic thiols can be readily oxidized to the disulfides quantitatively by calcium hypochlorite and moist Montmorillonite K10 under mild and neutral conditions.

α-Chlorination of Ketones with Sodium Chlorite, Mn(acac)3, and Alumina in Dichloromethane

Chlorination of a variety of aliphatic, alicyclic, and aromatic ketones with a reagent combination of NaClO2 and Mn(acac)3 catalyst can be readily performed in dichloromethane to afford α-chloroket...

Hydrogenation of alkenes with sodium borohydride and moist alumina catalyzed by nickel chloride

Abstract Aliphatic and aromatic alkenes were hydrogenated quantitatively to the corresponding alkanes with sodium borohydride, catalyzed by nickel chloride in the presence of moist alumina in hexane under mild conditions.

MMPP (Magnesium Monoperoxyphthalate) in Acetonitrile; A New Approach to the Synthesis of Lactones via Baeyer-Villiger Oxidation of Cyclic Ketones

Abstract A variety of unsubstituted and mono- or di-substituted cycloalkanones can be oxidised with modest excess of magnesium monoperoxyphthalate hexahydrate in acetonitrile to produce the corresponding lactones in a facile, selective, and high yielding manner.

Regioselective Aromatic Monobromination of Alkyl Phenyl Ethers with NaClO2, NaBr, Mn(acac)3, and Montmorillonite K10 in Dichloromethane

Abstract Regioselective and high-yielding nuclear monobromination of aromatic ethers can be accomplished with a combination of NaClO2, NaBr, and Mn(acac)3 catalyst in dichloromethane under mild and neutral conditions with the aid of Montmorillonite K10.

Nuclear Monobromination of Alkyl Phenyl Ethers with NaClO2, NaBr, Mn(acac)3, and Moist Silica Gel in Aprotic Solvent

Abstract Nuclear monobromination of aromatic ethers can be achieved with a NaClO2/NaBr/Mn(acac)3 catalyst/silica gel system in dichloromethane in regioselective and high-yielding manner under mild conditions.

A Convenient Deprotection of 1,3-Dithiane Derivatives with Ferric Nitrate Under Heterogeneous Conditions

Abstract 1,3-Dithianes derived from aromatic, aliphatic, and alicyclic ketones or aldehydes can be conveniently converted to the parent carbonyl compounds with a combination of ferric nitrate and silica gel in hexane in excellent to quantitative yields.

vic-Dichlorination of Olefins with Sodium Chlorite, Mn(acac)3, and Moist Alumina in Dichloromethane

Abstract Aliphatic, alicyclic, and aromatic alkenes underwent smooth vic-dichlorination upon treatment with a reagent combination of NaClO2, Mn(acac)3 catalyst, and chromatographic neutral alumina preloaded with a small amount of water in dichloromethane under mild conditions.

A Convenient Biphasic System (Alumina-Dichloromethane) for the Efficient Aromatic Monochlorination of Alkyl Phenyl Ethers with Sodium Chlorite in the Catalytic Presence of Manganese(III) Salt

Abstract A combination of sodium chlorite, (salen)manganese(III) catalyst, and chromatographic neutral alumina in dichloromethane can be successfully utilized for the aromatic monochlorination of a variety of alkyl phenyl ethers in excellent to quantitative yields under mild and anhydrous conditions.