- 作者: Norihiro Tokitoh,* Keiji Wakita, Takeshi Matsumoto, Takahiro Sasamori, Renji Okazaki, Nozomi Takagi, Masahiro Kimura and Shigeru Nagase
- 作者服務機構: Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- 中文摘要: Stable silabenzenes (1a; R = Tbt, 1b; R = Bbt) were synthesized by taking advantage of extremely bulky and efficient steric protection groups, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt) and 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl (Bbt). The structure of Tbt-substituted 1a was determined by X-ray crystallographic analysis, which demonstrated the complete delocalization of the π-electrons of the silabenzene ring. It was found that silabenzene 1a reacted with C–C and C–O multiple bond compounds to give the corresponding [4+2]-cycloadducts via 1,4-addition, while 1a underwent both 1,2- and 1,4-additions by the reaction with methanol. Silabenzene 1a dimerized very gradually to afford its [4+2]-dimer, although 1b showed no change under the same conditions. Photochemical reaction of 1a gave the corresponding silabenzvalene isomer instead of the Dewar silabenzene isomer.
- 英文摘要: --
- 中文關鍵字: Silabenzene; Kinetic stabilization; Silaaromatics; Delocalized p electrons; Silabenzvalene.
- 英文關鍵字: --