Hydrosilylation with Biscarbene Rh(I) Complexes: Experimental Evidence for a Silylene-Based Mechanism
作者:Peter Gigler、Bettina Bechlars、Wolfgang A. Herrmann、Fritz E. Kühn
DOI:10.1021/ja110017c
日期:2011.2.9
of the hydrosilylation of 4-F-acetophenone by N-heterocyclic biscarbene rhodium(I) complexes was performed, delivering substantial experimental evidence for a recently proposed catalytic cycle and explaining the observed side-product formation. Labeling experiments, silylene trapping reactions, and specific catalytic reactions were employed to substantiate each step of the catalytic cycle and explain
We report herein a pincer Ru-catalyzed dual intramolecular dehydrogenativesilylation of primary C(sp3)–H bonds. The reaction features high efficiency, scalability, and good functional group tolerance, allowing a facile and atom-economical access to structurally diverse silicon-centered spirocycles, including unprecedented oxa-spirosilabiindanes and aza-spirosilabiindanes.
diarylsilane by stirring with lithiumaluminumhydride in diethyl ether. The product is purified by bulb-to-bulb distillation. This method does not lead to any mono- or tri-substituted products and avoids handling gaseous and explosive dichlorosilane, which is a significant advantage over previously reported procedures. arylation - hydrosilylation - lithiation - reduction - silicon