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Synlett 2005(4): 615-618
DOI: 10.1055/s-2005-863709
DOI: 10.1055/s-2005-863709
LETTER
© Georg Thieme Verlag Stuttgart · New York
Development of Chiral Catalysts by Asymmetric Activation for Highly Enantioselective Diethylzinc Addition to Imines
Further Information
Received
26 December 2004
Publication Date:
22 February 2005 (online)
Publication History
Publication Date:
22 February 2005 (online)
Abstract
Based on the asymmetric activation concept, a library of chiral zinc complexes in situ formed by the combination of diimines derived from chiral 1,2-diphenyl-ethanene-1,2-diamine, BINOL derivatives, and diethylzinc are evaluated in the asymmetric addition of diethylzinc to N-acylimines. In the presence of 10 mol% L3ZnA1, high enantioselectivities and yields were provided for a wide range of aromatic imines in 1,2-dichloroethane at -25 °C.
Key words
asymmetric dialkylzinc addition - asymmetric activation - imine
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