A simple and efficient cyclocondensation reaction of 2,6-diaminopyrimidin-4(3H)-one and isatins for the synthesis of spiro[pyrimido[4,5-b]quinoline-5,5′-pyrrolo[2,3-d]pyrimidine] and spiro[indoline-pyrido[2,3-d:6,5-d′]dipyrimidine] derivatives is reported.
2,6-二氨基嘧啶-4(3 H)-one和靛红的简单高效环缩合反应合成螺[pyrimido [4,5 - b ]喹啉-5,5' - pyrrolo [2,3- d报道了[嘧啶]和螺[吲哚啉-吡啶[2,3- d:6,5- d ']双嘧啶]衍生物。