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  • Title: Pyrrolidine-thiourea as a bifunctional organocatalyst: highly enantioselective Michael addition of cyclohexanone to nitroolefins.
    Author: Cao CL, Ye MC, Sun XL, Tang Y.
    Journal: Org Lett; 2006 Jul 06; 8(14):2901-4. PubMed ID: 16805512.
    Abstract:
    [reaction: see text] Asymmetric Michael additions of cyclohexanone to both aryl and alkyl nitroolefins in the presence of 20 mol % of organocatalyst 2b and 10 mol % of n-butyric acid afford adducts 5 with high diastereoselectivities and enantioselectivities.
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