A New and Efficient Hypervalent Iodine−Benzyne Precursor, (Phenyl)[<i>o</i>-(trimethylsilyl)phenyl]iodonium Triflate: Generation, Trapping Reaction, and Nature of Benzyne
作者:Tsugio Kitamura、Masakatsu Yamane、Kensuke Inoue、Mitsuru Todaka、Norihiko Fukatsu、Zhaohong Meng、Yuzo Fujiwara
DOI:10.1021/ja992324x
日期:1999.12.1
the reaction in the presence of furan indicates a quantitative generation of benzyne and its efficient capture by the furan. Similarly, methylbenzynes (22 and 27) are efficiently generated from the corresponding methyl-substituted (trimethylsilyl)phenyliodonium triflates (12 and 13). The preparation of the hypervalent iodine−benzyne precursors, the generation of benzynes, the trapping reactions, and
报道了一种新的高效高价碘-苄前体,(苯基)[2-(三甲基甲硅烷基)苯基]碘鎓三氟甲磺酸盐 (10)。高价碘-苄前体 10 很容易通过 1,2-双(三甲基甲硅烷基)苯与 PhI(OAc)2/TfOH 试剂系统反应制备。在诸如呋喃、2-甲基呋喃、蒽、四苯基环戊二烯酮或 1,3-二苯基异苯并呋喃的捕集剂存在下,在室温下在 CH2Cl2 中用 Bu4NF 处理 10 可得到高产率的苯炔加合物。特别是,在呋喃存在下反应的结果表明苯的定量产生及其被呋喃有效捕获。类似地,从相应的甲基取代的(三甲基甲硅烷基)苯基碘鎓三氟甲磺酸盐(12 和 13)有效地生成甲基苄(22 和 27)。