3‐dioxopyrrolidine were reacted with malononitrile or ethyl cyanoacetate to give isoindole derivatives; however, pyrrolo[3,4‐b]pyridine derivatives were formed when cyanoacetamide was used. Moreover, pyrrolo[3,4‐d]pyrimidine derivatives were synthesized by treating 4‐benzylidene‐1,5‐diphenyl‐2,3‐dioxopyrrolidine with urea and/or thiourea under basic conditions. The structures of all the new synthesized compounds were
在
乙醇钠存在下,将1,5-二芳基-2,3-二氧杂
吡咯烷衍
生物与α-
氰基
肉桂腈和
α-氰基肉桂酸乙酯进行迈克尔加成反应,得到4 H-
吡喃并[2,3- c ]
吡咯衍
生物。在相同的反应条件下,1,5-二芳基-2,3-二氧杂
吡咯烷的亚烷基与
丙二腈或
氰基
乙酸乙酯反应,生成异
吲哚衍
生物。然而,当使用
氰基乙酰胺时,会形成
吡咯并[3,4- b ]
吡啶衍生物。此外,
吡咯并[3,4- d ]
嘧啶衍
生物是通过在碱性条件下用
尿素和/或
硫脲处理4-苄叉基-1,5
-二苯基-2,3-二氧杂
吡咯烷来合成的。所有新合成化合物的结构均通过元素分析,IR和NMR光谱确定。