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Conjugate addition of diethylzinc to enones catalyzed by homogeneous and supported chiral Ni-complexes. Cooperative effect of the support on enantioselectivity

AuthorsCorma, Avelino; Iglesias, Marta ; Martín, M. Victoria; Rubio, Jesús; Sánchez, Félix
Issue DateJul-1992
CitationTetrahedron Asymmetry 3(7): 845-848 (1992)
AbstractChiral t-butylaminocarbonylpyrrolidine acetylacetonate Ni(II) hexafluorophosphate and the corresponding supported complexes on silica and on a modified USY-zeolite are readily prepared. The application of these free and supported complexes as catalysts in the addition of diethylzinc to a series of different substituted enones affords chiral β-ethylated ketones in high yields with an enantiomeric excess up to 95%.
Publisher version (URL)https://doi.org/10.1016/S0957-4166(00)82180-1
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