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(D
CAA-
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D
CAA-
吡咯1的形成更加顺畅。D
CAA-
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。