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Synlett 2007(16): 2574-2578
DOI: 10.1055/s-2007-986630
DOI: 10.1055/s-2007-986630
LETTER
© Georg Thieme Verlag Stuttgart · New York
Hydroxymethylpyridine Catalysts for the Enantioselective Alkynylation of Aldehydes
Further Information
Received
20 March 2007
Publication Date:
28 August 2007 (online)
Publication History
Publication Date:
28 August 2007 (online)
Abstract
Chiral 2-hydroxymethylpyridines based on fenchol and menthol were evaluated as catalysts for the enantioselective addition of terminal alkynes to aldehydes. With one of the fenchol-based ligands, the operationally simple protocol gave propargylic alcohols with excellent yields and up to 85% ee for various aldehyde and alkyne derivatives.
Keywords
alkynes - propargylic alcohols - pyridines - asymmetric catalysis - zinc
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