Synthesis of New Pyrrolo Heterocycles (I): Novel Synthesis of Pyrano[2,3-<i>c</i>]pyrrole, Isoindoline, Pyrrolo[3,4-<i>b</i>]pyridine, and Pyrrolo[3,4-<i>d</i>]pyrimidine Derivatives
作者:F. Z. El-Ablak、N. S. Abu-Elenein、M. A. Sofan
DOI:10.1002/jhet.2520
日期:2016.11
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。