Auto-Tandem Catalysis in the Synthesis of Substituted Quinolines from Aldimines and Electron-Rich Olefins: Cascade Povarov−Hydrogen-Transfer Reaction
作者:Naoya Shindoh、Hidetoshi Tokuyama、Yoshiji Takemoto、Kiyosei Takasu
DOI:10.1021/jo8009243
日期:2008.10.3
hetero-Diels-Alder reaction (Povarov reaction) and hydrogen-transfer process. The reaction of electron-rich olefins and excess amount of imines in the presence of acid catalysts under appropriate conditions affords substituted quinolines in a single operation. In the cascade process, the catalysts, such as Tf2NH, TfOH, and Lewis acids, catalyze two mechanistically distinct reactions (auto-tandem catalysis)
我们证明了催化级联反电子需求杂Diels-Alder反应(Povarov反应)和氢转移过程。在合适的条件下,在酸催化剂的存在下,富电子的烯烃与过量的亚胺的反应在一次操作中得到取代的喹啉。在级联过程中,催化剂(例如Tf2NH,TfOH和路易斯酸)催化两个机理不同的反应(自动串联催化)。我们还描述了制备的喹啉的合成效用。