yields. A proposed mechanism involving initial formation of a spiro compound is given. This isolable intermediate subsequently rearranges via a sequential isocyanate ring opening and a cyclisation process to a urea derivative which finally cyclized to the indolo[3,2-c]quinolin-6-ones. The urea derivative could be prepared separately and cyclized selectively to indolo[3,2-c]quinolin-6-one. Reaction of N-acetylisatin
等摩尔量的
2-氨基苄胺和
靛红在
乙酸中的回流以良好的产率产生了
吲哚[3,2 - c ]
喹啉-6-酮。提出了一种涉及
螺环化合物初始形成的机制。该可分离的中间体随后通过顺序的
异氰酸酯开环和环化过程重排为
脲衍
生物,该
脲衍
生物最终环化为
吲哚[3,2 - c ]
喹啉-6-酮。
尿素衍
生物可单独制备并选择性环化为
吲哚[3,2- c]
喹啉-6一。N-乙酰基Isatin与2-
氨基苄基胺在室温下反应生成1,4-苯并二氮杂酮3-(2-乙酰
氨基苯基)-1,5-二氢-1,4-苯并二氮杂-2-酮,而其异构体2(2-乙酰
氨基苯并室温下由2-(2-乙酰
氨基苯基)-N-(2-
氨基苄基)-2-氧乙酰胺在
乙酸中获得)-4,5-二氢-1,4-苯并二氮杂-3-酮。