作者:Marta Larrosa、Sven Heiles、Jonathan Becker、Bernhard Spengler、Radim Hrdina
DOI:10.1002/adsc.201600156
日期:2016.6.30
We have developed an effective approach to 1,2‐disubstituted diamondoids by palladium(II) acetate catalyzed functionalization of CH bond. Selective mono‐arylation of the adamantane framework was achieved using picolylamide as a directing group in yields up to 87 %. Kinetic studies in combination with deuterium labeling experiments, competitive experiments and mass spectrometry contribute to the mechanistic
我们已经开发出一种有效的方法,可通过乙酸钯(II)催化CH键官能化来合成1,2-二取代的类金刚石。使用甲基吡啶酰胺作为指导基团可实现金刚烷骨架的选择性单芳基化,收率高达87%。在用氘标记实验,竞争性实验和质谱相结合的动力学研究有助于与C数的烷烃的芳基化过程的机制理解 H键相邻的定向基团。三氟甲磺酸酐促进该导向基团的环化反应生成咪唑并[1,5- a]吡啶衍生物。酸介导基团的去除提供了2-芳基类金刚石羧酸的接触途径,后者是合成各种生物活性化合物(候选药物)的常见前体。