An easy, inexpensive, safe, and effective preparative procedure to obtain symmetrical diaryliodonium bromides (in 17-88% crude yields) from various arenes is presented in this paper. A novel method for the in situ preparation of iodosyl sulfate (Chretien's reagent) is given. Eleven exemplary crude diaryliodonium bromides were readily oxidatively metathesized with 40% aqueous tetrafluoroboric acid and
本文介绍了一种从各种
芳烃中获得对称二芳基
碘溴化物(粗产率 17-88%)的简单、廉价、安全和有效的制备方法。给出了一种原位制备
硫酸碘糖酯(Chretien试剂)的新方法。用 40% 的四
氟硼酸水溶液和 30% 的
过氧化氢水溶液(在沸腾的
丙酮中,用作溶剂和“卤素清除剂”)容易地将十一种示例性粗二芳基
溴化二芳基
碘盐氧化复分解,以 15-85% 的收率得到纯二芳基
碘鎓四
氟硼酸盐。