391675-22-2Relevant academic research and scientific papers
Palladium-catalyzed double-silylation reactions of 3,4-carboranylene-1,1,2,2-tetraethyl-1,2-disilacyclobut-3-ene
Song, Kyu Ho,Jung, Il,Lee, Shim Sung,Park, Ki-Min,Ishikawa, Mitsuo,Kang, Sang Ook,Ko, Jaejung
, p. 5537 - 5541 (2001)
The reaction of the 1,2-dilithiated o-carborane with 1,2-dichlorotetraethyldisilane yielded the strained 3,4-carboranylene-1,1,2,2-tetraethyl-1,2-disilacyclobut-3-ene (2), which was found to be a good reactant for the double-silylation reaction. Thus, the reaction of 2 with RC≡CR′ in the presence of a catalytic amount of Pd(PPh3)4 yielded the six-membered disilyl ring compounds B10H10C2(SiEt2)2 (RC=CR′) R = Ph, R′ = H (6); R = Ph, R′ = CH3 (7); R = R′ = COOCH3 (8); R = C4H9, R′ = H (9). The palladium-catalyzed reaction of 2 with 4-nitrobenzaldehyde afforded 5,6-carboranylene-2-oxa-1,4-disilacyclohex-5-ene (10). In contrast, the reaction of 2 with trans-cinnamaldehyde under the same reaction conditions yielded the insertion compound 11 formed via insertion of a carbonyl group into each of the C-Si bonds of 2. The structures of compounds 2, 6, and 11 were determined by single-crystal X-ray crystallography.
