Improved and Practical Synthesis of [2,4,5-Tris(trimethylsilyl)- phenyl](phenyl)iodonium Triflate and Utilization as a 1,4-Benzdiyne Synthon
作者:Keisuke Gondo、Tsugio Kitamura
DOI:10.1002/adsc.201400081
日期:2014.6.16
triflouride⋅diethyl etherate [PhI(OAc)2/BF3⋅OEt2] reagent. The iodonium triflate generated 3,4‐bis(trimethylsilyl)benzyne quantitatively to give cycloadducts with tetraphenylcyclopentadienone, furan and anthracene in high yields. These cycloadducts bearing two trimethylsilyl groups were transformed into the corresponding aryne precursors, which underwent subsequent cycloaddition reactions to afford polycyclic
通过使用二乙酸苯乙鎓鎓/三氟硼化硼·二乙基醚化物[PhI(OAc),开发了一种高效且改进的方法,用于制备[2,4,5-三(三甲基甲硅烷基)苯基](苯基)碘化三氟磺酸盐作为1,4-苯并二炔合子。2 / BF 3 ⋅OEt 2]试剂。三氟甲磺酸碘可定量生成3,4-双(三甲基甲硅烷基)苯并zy,高产率地与四苯基环戊二烯酮,呋喃和蒽生成环加合物。这些带有两个三甲基甲硅烷基的环加合物被转化为相应的芳烃前体,随后进行环加成反应,从而以高收率得到高收率的多环芳族化合物,例如1,4-二氢-1,4-环氧乙烷蒽,萘三唑,三茂铁和蒽三唑衍生物。 。总反应在形式上被视为1,4-苯并二炔的双环加成反应。描述了该实用且有用的正式苯并二炔策略。