Aryl Bromides and Aryl Chlorides for the Direct Arylation of Benzylic Amines Mediated by Ruthenium(II)
作者:Navid Dastbaravardeh、Michael Schnürch、Marko D. Mihovilovic
DOI:10.1002/ejoc.201300004
日期:2013.5
importantly, also the cheaper aryl bromides and aryl chlorides can be applied as aryl sources. Additionally, the method does not require elaborate manipulations in a glove box and can be carried out in simple screw cap vials. Potassium pivalate proved to be beneficial for the transformation with aryl bromides or iodides as aryl source, but was not required for aryl chlorides. In the latter case, the addition
报道了钌(II)催化的苄胺与芳基卤的 sp3 C-H 键芳基化反应。在本方法中,芳基碘化物以及更重要的是更便宜的芳基溴化物和芳基氯化物可以用作芳基源。此外,该方法不需要在手套箱中进行复杂的操作,并且可以在简单的螺旋盖小瓶中进行。新戊酸钾被证明有利于芳基溴或碘化物作为芳基源的转化,但对于芳基氯则不需要。在后一种情况下,PPh3 的添加导致了高转化率。3-甲基和3-苯基吡啶被确定为定向基团,3-位的取代基代表了高转化率的关键结构特征。引导基团可以在转化后裂解,从而获得二芳基甲基胺。进行了机理研究,并与相关转化的机理报告进行了严格的比较。