Palladium-Catalyzed Bromoalkynylation of CC Double Bonds: Ring-Structure-Dependent Synthesis of 7-Alkynyl Norbornanes and Cyclobutenyl Halides
作者:Yibiao Li、Xiaohang Liu、Huanfeng Jiang、Bifu Liu、Zhengwang Chen、Peng Zhou
DOI:10.1002/anie.201100002
日期:2011.7.4
Strain versus flexibility: The palladium‐catalyzed reaction of haloalkynes with norbornene derivatives leads to 7‐alkynyl norbornane products (see scheme). Key to the success of this reaction is the formation of a “bridging” palladium species, which can rearrange to result in a C‐7 functionalization. The ring‐structure‐dependent [2+2] cycloaddition of haloalkynes with cyclooctene has been achieved in
应变与柔韧性:卤代炔烃与降冰片烯衍生物的钯催化反应可生成7-炔基降冰片烷产物(参见方案)。该反应成功的关键是形成“桥联”钯物质,该钯物质可以重新排列以导致C-7官能化。卤代炔烃与环辛烯的环结构依赖性[2 + 2]环加成反应在相似条件下以中等至良好的收率实现。