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Zinc complexes of chiral phenols as catalysts for enantioselective addition of organozinc reagents to aldehydes

โœ Scribed by E.J Corey; Francis J Hannon

Publisher
Elsevier Science
Year
1987
Tongue
French
Weight
240 KB
Volume
28
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

A class of zinc (II) chelates with chiral tertiary amino phenolic alcohols serve as effective catalysts for the enantioselective addition of diethylzinc to aromatic aldehydes with predictable absolute stereochemistry.

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Optically active set-alcohols in 90% enantiomeric excess were obtained from the enantioselective addition of dialkyl zincs to aryl aldehydes in the presence of a catalytic amount of dilithium salt of (2S, 52)-2, 5diisopropylpiperazine. Chiral piperazine (cyclic diamine) has rarely been utilized as c