Ruthenium(II)-Catalyzed sp<sup>3</sup> C–H Bond Arylation of Benzylic Amines Using Aryl Halides
作者:Navid Dastbaravardeh、Michael Schnürch、Marko D. Mihovilovic
DOI:10.1021/ol301680v
日期:2012.7.20
protocol for the direct arylation of benzylic amines was developed. Employing 3-substituted pyridines as directing groups, arylation was achieved using aryl bromides or aryl iodides as the aryl source. Potassium pivalate proved to be an important additive in this transformation. The arylation took place selectively in the benzylic sp3 position, and no significant competitive sp2 arylation was observed
建立了钌(II)催化的苄基胺直接芳基化的方案。使用3-取代的吡啶作为指导基团,使用芳基溴化物或芳基碘化物作为芳基源实现芳基化。新戊酸钾被证明是该转化过程中的重要添加剂。芳基化选择性地发生在苄基sp 3位置,没有观察到明显的竞争性sp 2芳基化。观察到少量的丙烯酸化亚胺为副产物。另外,建立了裂解吡啶基的反应条件,使得能够获得双芳基甲胺。