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2005
Enantioselective syntheses
O 0031
Ru-Catalyzed Asymmetric Hydrogenation of α-Phthalimide Ketones and 1,3-DiDiketones Using 4,4'-Substituted BINAPs. — A variety of catalysts containing
25- 029 aryl
BINAP-ligands (I) is prepared and tested in the title reaction. (Ia) shows the best catalytic effect; (Ib) is slightly more effective than BINAP, (Ie) is comparable with the latter
and (Ic) and (Id) are less effective. The reactions afford the corresponding alcohols (III)
with excellent e.e. and diols (V), (VII) with excellent e.e./d.e. values. — (HU, A.;
LIN*, W.; Org. Lett. 7 (2005) 3, 455-458; Dep. Chem., Univ. N. C., Chapel Hill,
NC 27599, USA; Eng.) — Steudel
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