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Relevant academic research and scientific papers

Molybdenum-catalyzed enantioselective sulfoxidation controlled by a nonclassical hydrogen bond between coordinated chiral imidazolium-based dicarboxylate and peroxido ligands

Chiral alkyl aryl sulfoxides were obtained by molybdenum-catalyzed oxidation of alkyl aryl sulfides with hydrogen peroxide as oxidant in mild conditions with high yields and moderate enantioselectivities. The asymmetry is generated by the use of imidazoli

Method for catalyzing asymmetric oxidation of sulfur ether

The invention provides a method for asymmetrically oxidizing sulfur ether. The sulfur ether is subjected to asymmetric catalytic oxidation reaction by taking a chiral complex formed by a four-tooth nitrogen organic ligand and a metal scandium compound as a catalyst and taking hydrogen peroxide as an oxidizing agent to obtain a corresponding chiral sulfoxide compound, and the yield and the enantioselectivity are more than 90 percent. The reaction has the advantages of cleanness, mild reaction condition, high conversion rate and high enantioselectivity. The method has an industrial prospect.

Molybdenum-catalyzed asymmetric sulfoxidation with hydrogen peroxide and subsequent kinetic resolution, using an imidazolium-based dicarboxylate compound as chiral inductor

A catalytic system based on simple and economic molybdenum compounds and a straightforwardly prepared imidazolium-based dicarboxylate compound, as chirality inductor, was developed for the catalytic asymmetric oxidation of sulfides with hydrogen peroxide. High yields of chiral methyl phenyl sulfoxide and good enantioselectivities (up to 40% ee) were achieved utilizing one equivalent of oxidant in 1?h. By combination of the enantioselective sulfoxidation and the concomitant kinetic resolution an 83% ee was obtained, an excellent enantioselectivity value for a molybdenum catalyst.

Method for preparing chiral sulfoxide through catalysis of asymmetric oxidation of thioether

The invention provides a method for preparing chiral sulfoxide. According to the method, in a mixed solvent, thioether is used as a substrate, a complex produced by chiral tetradentate organic ligand and a metal manganese compound in situ is used as a cat

Asymmetric oxidation catalyzed by myoglobin mutants

The sperm whale myoglobin active site mutants (L29H/H64L and F43H/H64L Mb) have been shown to catalyze the asymmetric oxidation of sulfides and olefins. Thioanisole, ethyl phenyl sulfide, and cis-β-methylstyrene are oxidized by L29H/H64L Mb with more than

Asymmetric Oxidation of Sulfides by Cyclohexanone Monooxygenase

Cyclohexanone monooxygenase catalyzes the asymmetric oxidazion of numerous alkyl aryl sulfides with the alkyl chain functionalyzed with Cl, CN, vinyl or hydroxy groups.Sulfoxides with enantiomeric excesses up to 99percent were obtained.The structure of th

Microbial Asymmetric Oxidation of 2-Alkoxyethylsulfides and a Facile Synthesis of Chiral Vinyl Sulfoxide

2-Alkoxyethyl phenyl sulfides were oxidized by incubation with Rhodococcus equi IFO 3730 to afford chiral sulfoxides of high enantio excess.Phenyl vinyl sulfoxide and 2-hydroxyethyl phenyl sulfoxide were obtained from microbial oxidation products without any loss their optical purities.