Reaction of (1,3-dioxo-2,3-dihydro-1H-inden-2-ylidene)propanedinitrile with N-arylisoindolines
作者:Dietrich Döpp、Alaa A. Hassan、Ahmed M. Nour El-Din、Aboul-Fetouh E. Mourad、Christian W. Lehmann、Jörg Rust
DOI:10.1016/j.tet.2006.09.070
日期:2006.12
In a multistep reaction, 3,3′-(2-aryl-2H-isoindol-1,3-ylene)-di-(1,4-naphthoquinone-2-carbonitriles) 13a–f have been formed in 25–61% yield from a series of N-arylisoindolines 8a–f with (1,3-dioxo-2,3-dihydro-1H-inden-2-ylidene)propanedinitrile (1) in aerated pyridine. The structure of one of these products (13f) has been unambiguously confirmed by a single crystal X-ray structure analysis. Under otherwise
在多步反应中,在25-61中形成了3,3'-(2-芳基2 H-异吲哚-1,3-亚乙基)-二-(1,4-萘醌-2-腈)13a – f一系列N-芳基异吲哚啉8a – f与(1,3-二氧代-2,3-二氢-1 H-茚满-2-亚烷基)丙腈(1)在充气吡啶中的收率(%)。通过单晶X射线结构分析已明确地确认了这些产物(13f)之一的结构。在其他相同条件下,2-(3-甲氧基苯基)-异吲哚啉(8g)和1得到38%的[4-(2,3-二氢-1 H-异吲哚-2-基)-2-甲氧基苯基] -1,3-二氧杂茚满-2-亚烷基)乙腈(15)。提出了涉及已知的将1的自由基阴离子重新排列为1,4-萘醌-2,3-二碳腈(3)的自由基阴离子的这些转化的理由。