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
The biocatalytic enantioselective oxidation of prochiral sulfides in the presence of a fungal unspecific peroxygenase from Agrocybe aegerita and hydrogen peroxide as oxidant was investigated. The synthesis of differently substituted (R)‐aryl alkyl sulfoxides was achieved with up to > 99 % conversion and > 99 % ee.
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.
Boyd, Derek R.; Sharma, Narain D.; Haughey, Simon A., Journal of the Chemical Society. Perkin transactions I, 1998, # 12, p. 1929 - 1933
作者:Boyd, Derek R.、Sharma, Narain D.、Haughey, Simon A.、Kennedy, Martina A.、McMurray, Brian T.、Sheldrake, Gary N.、Allen, Christopher C. R.、Dalton, Howard、Sproule, Kenneth