anhydride/2-fluoropyridine as an activation system, the couplingreactions of secondary N-aryl amides with terminal alkynes yielded substituted quinolines in moderate to excellent yields. The reaction tolerated both electron-donating and electron-withdrawing groups at the benzamide moiety. Electron-rich aryl acetylenes served as excellent coupling partners, and aliphatic terminal alkynes such as cyclopropyl
A Tf
<sub>2</sub>
O‐Promoted Synthesis of Functionalized Quinolines from Ketoximes and Alkynes
作者:Weiping Zheng、Weiguang Yang、Dongping Luo、Lin Min、Xinyan Wang、Yuefei Hu
DOI:10.1002/adsc.201801724
日期:2019.4.23
A new general synthesis of quinolines was developed from ketoximes and alkynes in the presence of Tf2O. It offered the first direct synthesis of quinolines by using the nitrilium salts generated in situ from a Tf2O‐promoted Beckmann rearrangement of ketoximes under very easy conditions.