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- W2949204420 abstract "A new class of enantioselective conjugate addition (ECA) reactions that involve aryl- or alkenylsilyl fluoride reagents and are catalyzed by chiral non-C2-symmetric Cu-based N-heterocyclic carbene (NHC) complexes are disclosed. Transformations have been designed based on the principle that a catalytically active chiral NHC−Cu−aryl or NHC−Cu−alkenyl complex can be accessed from reaction of a Cu−halide precursor with in situ-generated aryl- or alkenyltetrafluorosilicate. Reactions proceed in the presence of 1.5 equiv of the aryl- or alkenylsilane reagents and 1.5 equiv of tris(dimethylamino)sulfonium difluorotrimethylsilicate (TASF). Desired products are isolated in 63−97% yield and 73.5:26.5−98.5:1.5 enantiomeric ratio (47%−97% ee). A major focus of the present studies is the design, evaluation, and development of new chiral imidazolinium salts and their derived NHC−Cu complexes as catalysts that promote reactions of various carbosilanes to a range of electrophilic substrates. Toward this end, nearly 20 ne..." @default.
- W2949204420 created "2019-06-27" @default.
- W2949204420 creator A5054514619 @default.
- W2949204420 creator A5081485832 @default.
- W2949204420 date "2009-10-27" @default.
- W2949204420 modified "2023-09-25" @default.
- W2949204420 title "ChemInform Abstract: Monodentate Non-C2-symmetric Chiral N-Heterocyclic Carbene Complexes for Enantioselective Synthesis. Cu-Catalyzed Conjugate Additions of Aryl- and Alkenylsilylfluorides to Cyclic Enones." @default.
- W2949204420 cites W2098197200 @default.
- W2949204420 doi "https://doi.org/10.1002/chin.200943060" @default.
- W2949204420 hasPublicationYear "2009" @default.
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