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2004
Enantioselective syntheses
O 0031
Evaluation of the Relationship Between the Catalyst Structure and Regio- as well
Stereoselectivity in the Chiral Ammonium Bifluoride-Catalyzed Asymmetric
49- 022 as
Addition of Silyl Nitronates to α,β-Unsaturated Aldehydes. — Axially chiral binaphthyl-type quaternary ammonium bifluorides are tested as catalysts for the asymmetric addition of silyl nitronate (II) to cinnamaldehyde (I). The best results are obtained with the catalyst containing two 3,5-di-tert-butylphenyl groups. — (OOI, T.;
MORIMOTO, K.; DODA, K.; MARUOKA*, K.; Chem. Lett. 33 (2004) 7, 824-825;
Dep. Chem., Grad. Sch. Sci., Kyoto Univ., Sakyo, Kyoto 606, Japan; Eng.) —
R. Staver
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