钌催化的吡啶并三唑与萘醌的脱氮环化提供了苯并[ f ]吡啶并[1,2- a ]吲哚衍生物的良好到优异的产率。而在 PivOH 和 oxone 存在下,吡啶并三唑与吲哚一起在无金属条件下产生吲哚并 [3,2- b ] 吲哚。醌环化通过钌-卡宾中间体进行,而吲哚环化可以通过重氮-吡啶鎓中间体进行。对照实验表明两种转化都遵循离子机制。
Copper(II)-Catalyzed Carbon–Carbon Triple Bond Cleavage of Internal Alkynes for the Synthesis of Annulated Indolizines
作者:Jinwei Sun、Fuyao Wang、Huayou Hu、Xiangshan Wang、Hui Wu、Yun Liu
DOI:10.1021/jo500456d
日期:2014.5.2
Cleavage of C≡C bond in butynedioates via copper(II)-catalyzed reaction has been achieved, leading to the synthesis of benzo[f]pyrido[1,2-a]indole-6,11-diones in high yields by one-pot three-component reactions. In this unprecedented C≡C bond cleavage reaction of internal alkynes, both fragments from the alkyne are successively incorporated into the products.
通过铜(II)催化的反应实现了对丁炔中C≡C键的裂解,从而导致高收率的苯并[ f ]吡啶并[1,2- a ]吲哚-6,11-二酮的单-合成。锅三成分反应。在内部炔烃的这种前所未有的C≡C键裂解反应中,来自炔烃的两个片段均先后结合到产物中。