Selective synthesis of benzo[4,5]imidazo[2,1-a]isoquinolines via copper-catalyzed tandem annulation of alkynylbenzonitriles with 2-Iodoanilines
作者:Xiaodong Liu、Guobo Deng、Yun Liang
DOI:10.1016/j.tetlet.2018.06.030
日期:2018.7
efficient copper-catalyzed cascade cyclization reaction for selectively synthesizing a variety of benzo[4,5]imidazo[2,1-a]isoquinoline derivatives has been developed. The reaction features the formation of three different CN bonds in sequence. In the presence of Cu(OAc)2 and KOtBu, o-alkynylbenzonitriles and 2-iodoanilines proceeded smoothly to obtain the corresponding benzo[4,5]imidazo[2,1-a]isoquinolines
已开发出一种有效的铜催化级联环化反应,用于选择性合成各种苯并[4,5]咪唑并[2,1- a ]异喹啉衍生物。该反应特征在于依次形成三个不同的C N键。在存在Cu(OAc)2和KO t Bu的情况下,邻炔基苯甲腈和2-碘苯胺能顺利进行,以中等至良好的产率获得相应的苯并[4,5]咪唑并[2,1- a ]异喹啉。