A new rapid multicomponent domino heteroannulation of heterocyclic keteneaminals: solvent-free regioselective synthesis of functionalized benzo[g]imidazo[1,2-a]quinolinediones
作者:Li-Rong Wen、Qi-Chang Sun、Hai-Liang Zhang、Ming Li
DOI:10.1039/c2ob27137k
日期:——
A highly efficient and straightforward three-component cascadereaction was developed to synthesize benzo[g]imidazo[1,2-a]quinolinedione derivatives from heterocyclic ketene aminals (HKAs), aldehydes, and 2-hydroxy-1,4-naphthoquinone (HNQ) via Et3N-catalyzed tandem [3 + 2 + 1] annulationundersolvent-freeconditions. The reactions were very mild, convenient and highly regioselective to form new fused
开发了一种高效,简单的三组分级联反应,以从杂环中合成苯并[ g ]咪唑并[1,2- a ]喹啉二酮衍生物烯酮 缩醛(HKA),醛和 2-羟基-1,4-萘醌(HNQ)通过Et 3 N催化的串联[3 + 2 +1]在无溶剂条件下进行环化。反应非常温和,方便并且具有高度区域选择性,以形成新的稠合四环靶分子。