Hydroamination Reactions of Alkynes with<i>ortho</i>-Substituted Anilines in Ball Mills: Synthesis of Benzannulated N-Heterocycles by a Cascade Reaction
作者:Maik Weiße、Markus Zille、Katharina Jacob、Robert Schmidt、Achim Stolle
DOI:10.1002/chem.201406306
日期:2015.4.20
electrophilic alkynes and anilines with OH, NH, or SH groups in the ortho position. For the heterocycle formation, it was shown that several stress conditions were able to initiate the reaction in the solid state. Processing in a ball mill seemed to be advantageous over comminution with mortar and pestle with respect to process control. In the latter case, significant postreaction modification occurred during
结果表明,在行星式球磨机中,邻位取代的苯胺易于与乙炔二羧酸二乙酯发生加氢胺化反应。分子间加氢反应与分子内闭环的顺序偶联被用于由易得的结构单元即邻位具有OH,NH或SH基团的亲电炔烃和苯胺合成苯并恶嗪,喹喔啉和苯并噻嗪位置。对于杂环的形成,已表明几种应力条件能够以固态引发反应。就过程控制而言,在球磨机中进行处理似乎比用研钵和研杵粉碎更为有利。在后一种情况下,固态分析期间发生了显着的反应后修饰。低温研磨证明对试剂的分子转化有不利影响。