Borenium-Catalyzed Hydroborations of Silyl-Substituted Alkenes and Alkynes with a Readily Available N‑Heterocyclic Carbene–Borane
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https://figshare.com/articles/dataset/Borenium_Catalyzed_Hydroborations_of_Silyl_Substituted_Alkenes_and_Alkynes_with_a_Readily_Available_N_Heterocyclic_Carbene_Borane/2339278
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资源简介：
Borenium-catalyzed
hydroboration reactions of a stable, readily
available N-heterocyclic carbene–borane with allyl-, alkenyl-,
and alkynylsilane substrates provides either standard 1,2-hydroboration
products or rearranged 1,1-hydroboration products, depending on the
structure of the substrate. A competent catalyst can be generated
in situ by addition of bis(trifluoromethane)sulfonimide or diiodine.
In a typical 1,2-hydroboration, reaction of 1,3-dimethylimidazol-2-ylidine–borane
(diMe-Imd-BH3) with 1,2-bis(trimethylsilyl)ethene provides
1,3-dimethylimidazol-2-ylidine–(1,2-bis(trimethylsilyl)ethyl)borane
(diMe-Imd-BH2CH(TMS)CH2TMS)) as a stable product.
In a typical 1,1-hydroboration, the reaction of diMe-Imd-BH3 with bis(trimethylsilyl)ethyne provides 1,3-dimethylimidazol-2-ylidine–bis(2,2-bis(trimethylsilyl)ethenyl)borane
(diMe-Imd-BH(CHC(TMS)2)2 again as a
stable product.
创建时间：
2016-02-18
