Synthesis of Azahelicene<i>N</i>-Oxide by Palladium-Catalyzed Direct CH Annulation of a Pendant (<i>Z</i>)-Bromovinyl Side Chain
作者:Eri Kaneko、Yuki Matsumoto、Ken Kamikawa
DOI:10.1002/chem.201302083
日期:2013.9.2
the twist: Azahelicene derivatives were synthesized in high yields by utilizing palladium‐catalyzed CH annulation reactions (see scheme). Functionalization at the C5 position in 6‐azahelicene by using palladium‐catalyzed CH arylation also gave coupling products in good yields. A tandem intra‐ and intermolecular double CH coupling reaction was performed to give a functionalized helicene in a one‐pot
驱动苯轮扭转:Azahelicene衍生物以高产率通过利用钯催化的C下合成 ħ环反应(参见方案)。在官能化通过使用钯催化下,在6-azahelicene C5位 ħ芳基化也给了偶合产物以良好的收率。分子内和分子间双C的串联进行ħ偶联反应,得到单罐过程中的官能螺烯。