title: Photocatalytic Asymmetric Epoxidation of Terminal Olefins Using Water as an Oxygen Source in the Presence of a Mononuclear Non-Heme Chiral Manganese Complex.
abstract: Photocatalytic enantioselective epoxidation of terminal olefins using a mononuclear non-heme chiral manganese catalyst, [(R,R-BQCN)MnII]2+, and water as an oxygen source yields epoxides with relatively high enantioselectivities (e.g., up to 60% enantiomeric excess). A synthetic mononuclear non-heme chiral Mn(IV)-oxo complex, [(R,R-BQCN)MnIV(O)]2+, affords similar enantioselectivities in the epoxidation of terminal olefins under stoichiometric reaction conditions. Mechanistic details of each individual step of the photoinduced catalysis, including formation of the Mn(IV)-oxo intermediate, are discussed on the basis of combined results of laser flash photolysis and other spectroscopic methods.
authors.affiliation: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 03760, Korea.
authors.forename: Duyi
authors.initials: D
authors.lastname: Shen
authors.affiliation: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 03760, Korea.
authors.forename: Claudio
authors.initials: C
authors.lastname: Saracini
authors.affiliation: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 03760, Korea.
authors.forename: Yong-Min
authors.initials: YM
authors.lastname: Lee
authors.affiliation: State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Sun
authors.affiliation: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 03760, Korea.|Faculty of Science and Engineering, Meijo University, SENTAN, Japan Science and Technology Agency (JST) , Nagoya, Aichi 468-8502, Japan.
authors.forename: Shunichi
authors.initials: S
authors.lastname: Fukuzumi
authors.affiliation: Department of Chemistry and Nano Science, Ewha Womans University , Seoul 03760, Korea.|State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China.
authors.forename: Wonwoo
authors.initials: W
authors.lastname: Nam
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002384:Catalysis; D004852:Epoxy Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D008345:Manganese / Q000737:chemistry*; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry*; D055668:Photochemical Processes; D014867:Water / Q000737:chemistry*
chemical_list: D000475:Alkenes; D004852:Epoxy Compounds; D014867:Water; D008345:Manganese; D010100:Oxygen