Oxime-Palladacycle-Catalyzed Suzuki-Miyaura Arylation and Alkenylation of Aryl Imidazolesulfonates under Aqueous and Phosphane-Free Conditions
作者:José Francisco Cívicos、Diego A. Alonso、Carmen Nájera
DOI:10.1002/ejoc.201200368
日期:2012.7
Aryl and hetaroaryl imidazole-1-sulfonates are efficiently arylated and alkenylated with aryl- and alkenylboronic acids and potassium trifluoroborates by using 0.5 mol-% palladacycles 1 or Pd(OAc)2 at 110 °C under aqueous and phosphane-free conditions. Reactions can be performed by using conventional or microwave heating, leading to biaryls, stilbenes, and alkenylarenes in good to high yields, and
芳基和杂芳基咪唑-1-磺酸盐通过使用 0.5 mol% 钯环 1 或 Pd(OAc)2 在 110 °C 下,在水性和无磷烷条件下,被芳基和烯基硼酸以及三氟硼酸钾有效地芳基化和烯基化。反应可以通过使用常规或微波加热进行,从而以良好到高产率以及高区域选择性和非对映选择性产生联芳烃、芪和烯基芳烃。优化的方法允许原位苯酚磺酰化和一锅 Suzuki 芳基化或烯基化以及含卤素芳基咪唑磺酸盐的正交功能化。