Enantioselective Aromatic Sulfide Oxidation and Tandem Kinetic Resolution Using Aqueous H<sub>2</sub>O<sub>2</sub>and Chiral Iron-Bis(oxazolinyl)bipyridine Catalysts
作者:Angela Jalba、Noémie Régnier、Thierry Ollevier
DOI:10.1002/ejoc.201601597
日期:2017.3.27
An efficient method for the oxidation of aromaticsulfides was developed using aqueous H2O2 catalyzed by in situ-generated chiral Fe/6,6'-bis(oxazolinyl)-2,2'-bipyridine (bipybox) complex. The corresponding sulfoxides were obtained in high enantio-selectivities (up to 98.5:1.5 er) and good yields (up to 61%) when the mono-oxidation of the sulfides was performed in combination with the kinetic resolution
Asymmetric oxidation of aryl sulfides by iodosobenzene has been achieved using the novel iron porphyrin catalysts derived from the antipodes of a C2-chiral 1,4-xylylene-strapped porphyrin, affording the corresponding sulfoxides in 18–71% enantiomeric excess.