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- W2950951657 abstract "The asymmetric alkylation with diethylzinc of five heterocyclic aldehydes and benzaldehyde (for comparison) has been studied in the presence of two optically active amino alcohols: (S)-2-amino-1-butanol (AB) and (1S,2R)-N,N-dibutylnorephedrine (DBNE). A number of chiral (hetero)aromatic secondary alcohols were synthesized in high yields (95–98%) with enantioselectivity up to 92% enantiomeric excess (ee) in the presence of DBNE catalyst. Optically active thienyl and 4-pyridyl derivatives were prepared for the first time by catalytic asymmetric alkylation. The influence of the amount of DBNE on the enantioselectivity was investigated. In contrast to benzaldehyde, 2-furan- and 2-thiophene-carbaldehydes, in the case of 3- and 4-pyridinecarbaldehydes the ee values depend directly on the catalyst concentration. © 1998 John Wiley & Sons, Ltd." @default.
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- W2950951657 date "2010-06-18" @default.
- W2950951657 modified "2023-09-28" @default.
- W2950951657 title "ChemInform Abstract: Catalytic Enantioselective Addition of Diethylzinc to (Hetero)Aromatic Aldehydes." @default.
- W2950951657 cites W1994681372 @default.
- W2950951657 doi "https://doi.org/10.1002/chin.199848025" @default.
- W2950951657 hasPublicationYear "2010" @default.
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