Preparation of an Indolylfulgimide-Adamantane Linker Conjugate with Nitrile Anchoring Groups through Palladium-Catalyzed Transformations
作者:Sebastian Zarwell、Steffen Dietrich、Christine Schulz、Paul Dietrich、Fabian Michalik、Karola Rück-Braun
DOI:10.1002/ejoc.200801199
日期:2009.5
We report the preparation, through palladium-catalyzed transformations, of the indolylfulgimide linker conjugate 1, containing an adamantane core and nitrile anchoring groups. The ethynylene-linker 12 for the final Sonogashira coupling was prepared through palladium-mediated cyanation of an iodo-substituted precursor with Zn(CN)2. The synthesis of the 6-bromo-substituted indolylfulgimide coupling partner
我们报告了通过钯催化转化制备包含金刚烷核心和腈锚定基团的吲哚基氟酰亚胺接头偶联物 1。用于最终 Sonogashira 偶联的乙炔-接头 12 是通过钯介导的碘取代前体与 Zn(CN) 2 的氰化反应制备的。6-溴取代的吲哚基氟酰亚胺偶联物 2 的合成分七个步骤完成。进行使用苯乙炔和 5-溴取代的吲哚 13 的模型研究,以寻找在最终 Sonogashira 偶联步骤中防止乙炔连接基 12 均偶联的条件。在二异丙胺存在下使用 Pd(PhCN)2Cl2 和 [(tBu)3PH]BF4,连同 CuI 作为添加剂,被证明是最有效的。最后,