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2001
diastereoselective syntheses, enantioselective syntheses
diastereoselective syntheses, enantioselective syntheses (incl. cis/trans-isomerism)
O 0031
Catalytic Asymmetric Friedel–Crafts Alkylation of β,γ-Unsaturated
16 - 037 α-Ketoesters: Enantioselective Addition of Aromatic C–H Bonds
to Alkenes.
— Ketoesters (II) or (IV), bearing methyl, phenyl, and
protected alcohol groups as alkene substituents, are added to heteroaromatic
and aromatic compounds (I), (VI), or (IX) in a highly enantioselective manner
in the presence of catalytic amounts of chiral bisoxazoline copper complexes
cat.1 and cat.2 . In all cases, the chiral center formed in the reactions has the
R configuration. — (JENSEN, KIM B.; THORHAUGE, JACOB; HAZELL,
RITA G.; JOERGENSEN, KARL ANKER; Angew. Chem., Int. Ed. 40 (2001)
1, 160-163; Cent. Met. Catal. React., Dep. Chem., Aarhus Univ., DK-8000
Aarhus, Den.; EN)
1
2001
diastereoselective syntheses, enantioselective syntheses
2
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