A simple and efficient synthesis of novel 6,6′‐(arylmethylene)bis(benzo[a]phenazin‐5‐ol) derivatives has been developed via a sequential one‐pot, two‐step, pseudo‐five‐component tandem reaction starting from 2‐hydroxynaphthalene‐1,4‐dione, o‐phenylenediamine, and aromatic aldehydes in the presence of 2‐aminopyridine as co‐catalyst and p‐TsOH as catalyst at 90°C under solvent‐free conditions. This sequential green process offers several advantages, such as operational simplicity, high yield, low cost, easy handling, clean reactions, absence of any tedious work‐up, and purification of products by non‐chromatographic methods.

中文翻译：

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绿色的一锅法伪五组分顺序规程，用于合成新型6,6'-（芳基亚甲基）双（苯并[a]吩嗪-5-醇）衍生物

通过顺序的一锅，两步，伪五组分串联反应开始，开发了一种简单有效的新型6,6'-（芳基亚甲基）双（苯并[ a ]吩嗪-5-醇）衍生物的合成方法在无溶剂条件下于90°C下在2-氨基吡啶作为助催化剂和p - TsOH作为催化剂的情况下，由2-羟基萘-1,4-二酮，邻苯二胺和芳族醛制得。这种连续的绿色工艺具有多个优点，例如操作简便，产率高，成本低，易于处理，反应干净，无需任何繁琐的后处理以及可通过非色谱法纯化产物。