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2005
Enantioselective syntheses
O 0031
Highly Enantioselective Asymmetric Hydrogenation of β-Acetamido DehydroAcid Derivatives Using a Three-Hindered Quadrant Rhodium Catalyst.
04- 032 amino
— The title rhodium catalyst is shown to provide high enantioselectivity for the asymmetric hydrogenation of E- and Z-acetamido dehydroamino acid substrates. The enantioselectivity of all the reactions achieved up to 99% e.e. In some cases, increase in
enantioselectivity is achieved via changes in solvent and pressure of hydrogen. Asymmetric hydrogenation of a cyclic compound (VIII) proceeds with 85% e.e. — (WU,
H.-P.; HOGE*, G.; Org. Lett. 6 (2004) 20, 3645-3647; Pfizer, Inc., Ann Arbor, MI
48105, USA; Eng.) — Steudel
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