Synthesis of Dibenzo[<i>b</i>,<i>f</i>]azepines via Palladium‐Catalyzed Cascade [4 + 3] Annulation of <i>o</i>‐Alkenyl Bromoarenes and <i>o</i>‐Bromoaniline Derivatives
作者:Xin‐Chen Zhan、Guo‐Qiang Lin、Jian‐Guo Fu、Xiao‐Ming Ji、Shu‐Sheng Zhang、Chen‐Guo Feng
DOI:10.1002/adsc.202300336
日期:2023.12.5
A cascade [4+3] annulation of o-alkenyl bromoarenes and o-bromoaniline derivatives was described. Various dibenzo[b,f]azepines with substitutions on the 10/11 position were obtained in 14–97% yields. The synthetic versatility of this protocol is highlighted by the preparation of a precursor of the drug molecule oxcarbazepine, a gram-scale synthesis, and two product transformations. Unlike previous
描述了邻-烯基溴芳烃和邻-溴苯胺衍生物的级联[ 4+3]环化。获得了在 10/11 位点上有取代的各种二苯并[ b , f ]氮杂卓化合物,产率为 14-97%。该方案的合成多功能性通过药物分子奥卡西平前体的制备、克级合成和两种产品转化来突出。与之前的胺化/Heck 序列不同,该级联过程应该经历 C(乙烯基)、C(芳基)-钯环参与途径。