Synthesis of 1,2-Fused Benzimidazoles by Amine-Initiated [3 + 3] Annulations of β′-Acetoxy Allenoates with 1C,3N-Bisnucleophiles
作者:Chunjie Ni、Shiyu Pan、Chen Yuan、Shuya Qin
DOI:10.1021/acs.joc.3c00679
日期:2023.7.7
well with a wide substrate scope, delivering novel 1,2-fused benzimidazole derivatives in moderate to good yields. In addition, preliminary attempts on the asymmetric version of this reaction have been explored by using cinchona alkaloid-based tertiary amines.
已经建立了胺催化的 β'-乙酰氧基联烯酸酯与 1C,3N-双亲核试剂的 [3 + 3] 成环反应。在最佳反应条件下,这种操作简单的合成工艺适用于广泛的底物范围,以中等至良好的产率提供新型 1,2-稠合苯并咪唑衍生物。此外,还通过使用基于金鸡纳生物碱的叔胺对该反应的不对称形式进行了初步尝试。