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- W2051211434 abstract "Spectacular solvent effects in the asymmetric hydrogenation of methyl 3,5-dioxohexanoate (3) and 2,4-pentanedione (5) have been observed using Ru[(S)-Ph,Ph-oxoProNOP]X2 complexes (X=η3-C4H7, IIa; CF3CO2, IIb; (R)-MTPA, IIc) as catalyst precursors. β-Diketones 3 and 5 are respectively reduced to the corresponding β-diols 4 and 6. In both cases, an almost complete reversal in the diastereoselectivity of the reaction is observed when changing the solvent from CH2Cl2 (syn-4 in up to 92% de; meso-6 in up to 84% de) to a 1:1 CH2Cl2–CH3OH mixture (anti-4 and anti-6 in up to 84% de). The extent of this solvent effect is much less marked with Ru-atropisomeric diphosphine catalysts." @default.
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- W2051211434 date "2000-01-01" @default.
- W2051211434 modified "2023-10-18" @default.
- W2051211434 title "Tuning diastereoselectivity with the solvent: the asymmetric hydrogenation of simple and functionalized 1,3-diketones with ruthenium(amidophosphine–phosphinite) catalysts" @default.
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- W2051211434 doi "https://doi.org/10.1039/b000962h" @default.
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