Three-component coupling (3CC) of aldehyde, 1,3-dione, and 4-phenylurazole has been achieved in the presence of 10 mol % anhydrous FeCl3 in acetonitrile under reflux conditions to afford the corresponding triazolo[1,2-a]indazoletriones in excellent yields while the coupling of isatins with 4-phenylurazole and 1,3-diones gave the spirotriazolo[1,2-a]indazoletetraones under similar conditions.
在无
水氯化
铁(FeCl3)存在下,通过三组分耦合(3CC)反应,将醛、1,3-二酮和4-苯基
脲唑在
乙腈中于回流条件下反应,成功合成了相应的三唑[1,2-a]
吲唑三酮,产率极高。而在相似条件下,将
异喹啉与4-苯基
脲唑和1,3-二酮进行耦合反应则生成了螺三唑[1,2-a]
吲唑四酮。