REVERSIBILITY IN THE HOMOLYTIC AROMATIC SUBSTITUTION WITH SILYL AND GERMYL RADICALS
作者:Hideki Sakurai、Mitsuo Kira、Hisashi Sugiyama
DOI:10.1246/cl.1983.599
日期:1983.4.5
The 3,6-bis(trimethylsilyl)cyclohexadienyl radical (1), generated from the corresponding cyclohexadiene, gave the expected p-bis(trimethylsilyl) benzene (4) at 0°C. At 130°C, however, the reaction afforded trimethylsilylbenzene, 4, and m-bis(trimethylsilyl)benzene in 62, 17, and 5% yield, respectively. The suggested elimination of the trimethylsilyl radical from the cyclohexadienyl radical is demonstrated by ESR.
由相应的环己二烯生成的 3,6-双(三甲基硅基)环己二烯自由基 (1),在 0°C 时可得到预期的对二(三甲基硅基)苯 (4)。但在 130°C 时,反应生成了三甲基硅基苯、4 和间双(三甲基硅基)苯,收率分别为 62%、17%和 5%。ESR 证明了三甲基硅基从环己二烯基中消除的可能性。