Sl. Griffiths et al., ASYMMETRIC OXIDATION OF SULFENYL SUBSTITUTED TRICARBONYL(ETA(6)-ARENE)CHROMIUM(0) COMPLEXES, Tetrahedron : asymmetry, 5(4), 1994, pp. 545-548
Oxidation of sulfenyl substituted tricarbonyl(eta(6)-arene)chromium(0)
complexes with Ti(OPri)(4) / diethyl tartrate / H2O / cumene hydroper
oxide (2:4:2:1.3) gives sulfinyl substituted tricarbonyl(eta(6)- arene
)chromium(0) complexes in 60-73% yield and 81-86% e.e. (29-60% yield a
nd 90-greater than or equal to 95% e.e. after crystallisation); diethy
l L-(+)-tartrate was shown to lead to complexes of R configuration.