NHC–Cu-Catalyzed Silyl Conjugate Additions to Acyclic and Cyclic Dienones and Dienoates. Efficient Site-, Diastereo- and Enantioselective Synthesis of Carbonyl-Containing Allylsilanes
作者:Kang-sang Lee、Hao Wu、Fredrik Haeffner、Amir H. Hoveyda
DOI:10.1021/om300790t
日期:2012.11.26
Efficient and highlydiastereo- and enantioselective conjugate additions of phenyldimethylsilyl units to acyclic and cyclic dienones and dienoates are disclosed. The C–Si bond forming reactions are catalyzed by 2.0–2.5 mol % of a coppercomplex of a chiral monodentate N-heterocyclic carbene; the requisite reagent, PhMe2Si–B(pin), is commercially available or can be easily prepared. Transformations