Novel approach to the synthesis and optical absorption properties of 2-(2-oxo-1,2-dihydro-3<i>H-</i>pyrrole-3-ylidene)malononitriles
作者:Angelina G. Milovidova、Mikhail Yu. Belikov、Mikhail Yu. Ievlev、Oleg E. Nasakin、Oleg V. Ershov、Viktor. A. Tafeenko
DOI:10.1080/00397911.2020.1852434
日期:2021.3.4
7-dioxabicyclo[3.2.1]octane-4,4,5-tricarbonitriles 3 and morpholine. This approach involving sequential furan and pyran ring-opening of the 2,7-dioxabicyclo[3.2.1]octane moiety with further pyrrole ring-closure, resulted in a smoother formation of DCAA-pyrroles 1. The optical absorption properties of DCAA-pyrroles 1 were studied for the first time. The absorption maxima were observed in the range of 506–545 nm showing
抽象的 实施了两种合成2-(2-氧代-5-芳基-1,2-二氢-3 H-吡咯-3-亚烷基)丙二腈(DCAA-吡咯1)的方法。第一个是基于吗啉的作用,转化了4-氧代丁烷-1,1,2,2-四腈2。第二种方法是基于4-氧代丁烷-1,1,2,2-四腈2的保护形式即2,7-二氧杂双环[3.2.1]辛烷-4,4,5-三腈3与吗啉之间的反应。这种方法涉及顺序的呋喃和吡喃开环的2,7-二氧杂双环[3.2.1]辛烷部分与进一步的吡咯环封闭,导致DCAA-吡咯1的形成更加顺畅。DCAA-吡咯的光吸收特性1进行了研究,第一次。在506–545 nm范围内观察到最大吸收,表现出正溶剂溶变色并依赖于芳基部分中的取代基。