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Iridium‐Catalyzed Regio‐ and Enantioselective Allylic Substitution of Silyl Dienolates Derived from Dioxinones
Authors:Ming Chen  Prof. John F. Hartwig
Affiliation:Department of Chemistry, University of California, Berkeley, CA 94720 (USA)
Abstract:
Reported herein is the iridium‐catalyzed regio‐ and enantioselective allylic substitution reactions of unstabilized silyl dienolates derived from dioxinones. Asymmetric allylic substitution of a variety of allylic trichloroethyl carbonates with these silyl dienolates gave γ‐allylated products selectively in 60–84 % yield and 90–98 % ee.
Keywords:alkylation  allylic compounds  asymmetric catalysis  enantioselectivity  iridium
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