| 초록 |
The thermal hydrosilylations of trichlorosilane (1a) with cyclic alkadiene such as cyclopentadiene (2a), 1,3-cyclohexadiene, and 1,4-cyclohexadiene were studied at temperatures ranging from 170 °C to 270 °C. The reaction of 2a with 1a at 250 °C afforded 2-cyclopentenyltrichlorosilane (3a) as the major hydrosilylation product in good yield (82%). This reaction also works when dicyclopentadiene (2a′) was used as a reactant instead of 2a. Under the same conditions, 3a was obtained in 82% isolated yield. It is significant to note that 2a′ can be used for the hydrosilylation, with no requirement of a cracking step under our thermal conditions. While the reaction of cyclohexadienes with 1a under the same conditions gave a mixture of hydrosilylation products such as 2-cyclohexenyltrichlorosilane, 3-cyclohexenyltrichlorosilane and cyclohexyltrichlorosilane in moderate yields. |
