Novel Fréchet-type dendritic BINOL ligands and their applications in Ti(IV) complex catalyzed asymmetric addition of diethylzinc to aldehydes

New Fréchet-type dendritic BINOL ligands bearing several BINOL units at the periphery have been successfully synthesized. The (dendritic BINOL) Ti(IV) complexes were proved to be efficient catalysts for the enantioselective addition of diethylzinc to aromatic aldehydes. Moreover, these ligands could...

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Bibliographic Details
Published in:Chinese chemical letters 2007-12, Vol.18 (12), p.1487-1489
Main Authors: Yin, Liang, Wang, Chao Feng, Wang, Huan Ling, Li, Rong, Ma, Jian Tai
Format: Article
Language:English
Subjects:
Aldehydes
Asymmetric catalysis
BINOL
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Summary:New Fréchet-type dendritic BINOL ligands bearing several BINOL units at the periphery have been successfully synthesized. The (dendritic BINOL) Ti(IV) complexes were proved to be efficient catalysts for the enantioselective addition of diethylzinc to aromatic aldehydes. Moreover, these ligands could be quantitatively recovered and reused at least five times without a loss of the yield and enantioselectivity.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2007.10.014