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  • Title: Allyl sulfones as precursors to allylzincs in the palladium-catalyzed zinc-ene cyclization: highly efficient synthesis of enantiopure (-)-erythrodiene.
    Author: Deng K, Chalker J, Yang A, Cohen T.
    Journal: Org Lett; 2005 Aug 18; 7(17):3637-40. PubMed ID: 16092838.
    Abstract:
    Easily prepared allyl phenyl sulfones, capable of introduction of the alkene by electrophilic alpha-substitution, are superior to allyl acetates as substrates for Pd-catalyzed Zn-ene cyclizations, providing C5 or C(4)N rings with cis-1,2-vinyl and -CH(2)Zn substituents. Several examples, with different methods of substrate preparation, are presented. [reaction: see text]
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