Selenobenzophenones and Diazoalkanes: Isolation of Tetraarylethylenes by the Reaction of Benzophenone Hydrazones with Diselenium Dibromide
作者:Kentaro Okuma、Kazuki Kojima、Kosuke Oyama、Kento Kubo、Kosei Shioji
DOI:10.1002/ejoc.200300510
日期:2004.2
retrocyclization was observed. The formation of 1,3,4-selendiazolines was independently confirmed by the reaction of benzophenone hydrazones with diselenium dibromide, which afforded tetraarylethylenes in good yields. This method is applicable to the two-step synthesis of tetraarylethylenes from benzophenones. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
硒代二苯甲酮与重氮甲烷反应得到相应的二芳基乙烯和对称烯烃。与二芳基重氮甲烷反应得到三种不同类型的四芳基乙烯。该反应通过 1,3,4-硒二唑啉中间体进行,并观察到逆环化。通过二苯甲酮腙与二溴化二硒的反应独立地证实了 1,3,4-硒二唑啉的形成,其以良好的产率提供了四芳基乙烯。该方法适用于二苯甲酮两步合成四芳基乙烯。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)