A one‐pot and pseudo four‐component synthesis of spiro[diindeno[1,2‐b:2′,1′‐e]pyridine‐11,3′‐indoline]‐trione derivatives by cyclo‐condensation reaction of isatins, 1,3‐indandione, and ammonium acetate in refluxing acetic acid is reported. J. Heterocyclic Chem., (2010).
靛红的环缩合反应,一锅法和假四组分合成螺[diindeno [1,2- b:2',1'- e ]吡啶-11,3'-二氢吲哚]-三酮衍生物,1据报道有3-3-茚满二酮和乙酸铵在回流的乙酸中。J.杂环化学。(2010)。