heteroaryltrifluoroborates in Suzuki-Miyaura cross-coupling reactions is presented. The coupling of aryl- and electron-rich heteroaryltrifluoroborates with aryl and activated heteroaryl bromides proceeds readily under ligandless conditions. When deactivated aryl- and heteroaryltrifluoroborates are coupled with aryl and heteroaryl bromides and chlorides, a low loading (0.5-2%) of PdCl(2)(dppf).CH(2)Cl(2) efficiently
提出了对Suzuki-Miyaura交叉偶联反应中芳基三
氟硼酸钾和杂芳基三
氟硼酸钾的反应性的扩展研究。富芳基和电子富集的杂芳基三
氟硼酸酯与芳基和活化的杂芳基
溴化物的偶联在无
配体条件下容易进行。当钝化的芳基和杂芳基三
氟硼酸酯与芳基和杂芳基
溴化物和
氯化物偶联时,PdCl(2)(dppf).CH(2)Cl(2)的低负载量(0.5-2%)有效催化反应。在任何一种条件下,反应通常可以在露天气氛中进行。