Stereoselective photocatalysis of helical ruthenium(II) complexes in the reduction of racemic tris(acetylacetonato)cobalt(III)
Abstract
The Stereoselective photoreduction of rac-[Co(acac)3](Hacac = acetylacetone) possessing molecular helicities [P(C3) for Δ and M(C3) for Λ] by several ruthenium(II) photocatalysts having either P(C3) or M(C3) helical symmetry was successfully performed with a maximum enantiomeric excess of 38.7% at 40% conversion {to [Co(acac)2(H2O)2]} in EtOH–H2O (7 : 3) at 25 °C with an enantiomer rate ratio kΔ/kΛ of 5.2 : 1.
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