Silylcarbocyclization of Diynes

Rhodium-catalyzed three-component domino coupling of 1,6-diyne 41, hydrosilane, and Cgo proceeds to give fullerene adduct 42 in good yield (Eq. 10) [29]. In this case, dienophile Cgo does not interfere with the silylcarbocyclization process and traps the 1,2-bis-exo-methylidenecyclopentane intermediates to furnish the corresponding Cgo-linked carbo- or heterocycle 42. 

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In 1992, Tamao et al. reported the first example of the Ni-catalyzed silylcarbo-cyclization of diynes. Thereafter, Ojima et al. extensively developed rhodium-catalyzed silylcarbocyclizations of diynes, enynes, triynes, and endijmes. ... 

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