作者:Shurupova, Olga V.、Tarasova, Ekaterina S.、Rzhevskiy, Sergey A.、Minaeva, Lidiya I.、Topchiy, Maxim A.、Asachenko, Andrey F.
DOI:10.1039/d4ob00994k
日期:——
A novel convenient 2-step synthesis of substituted pyrido[1,2-a]indoles is developed starting from easily available pyrylium tetrafluoroborates and ortho-bromoanilines. A conversion of the pyrylium tetrafluoroborates to pyridinium ones followed by their palladium catalyzed intramolecular cyclization allows the formation of 24 examples of N-fused heterocycles. A one-pot two-stage cyclization procedure
以容易获得的四氟硼酸吡喃鎓和邻溴苯胺为原料,开发了一种新型方便的两步合成取代吡啶并[1,2- a ]吲哚的方法。将四氟硼酸吡啶鎓转化为吡啶鎓,然后通过钯催化的分子内环化可以形成 24 个 N-稠合杂环。开发了一锅两阶段环化程序。通过合成带有不同烷基、芳基、氯、氟和甲氧基取代基的新型吡啶并[1,2- a ]吲哚,证明了该方法的实用性。