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Synthesis of 1,1-disilanes

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The conversion of geminal dibromides into 1,1-disilylated alkanes in the presence of a Si-B reagent as the silicon pronucleophile is promoted by a copper(I) catalyst generated in situ from CuBr·SMe2 and 4,4′-di-tert-butyl-2,2′-bipyridine. The two C(sp3)-Si bond-forming events differ in mechanism, with the first being ionic and the second being radical.
H. Hazrati, M. Oestreich, Org. Lett., 2018, 20, 5367-5369.

Related


An organocalcium complex catalyzes dehydrogenative silylation and mono/dihydrosilylation tandem reactions of terminal alkynes with hydrosilanes to provide gem-disilylated alkenes in moderate yields or gem-trisilylated alkanes in high yields. The gem-disilylated alkenes can be easily transformed into other organosilanes.
T. Li, R. Liu, X. Liu, Y. Chen, Org. Lett., 2023, 25, 761-765.