For the first time the 4-dimethylaminopyridine (DMAP) catalyzed straightforward and efficient procedure has been developed for the synthesis of 3,3′-(arylmethylene)bis(2-hydroxynaphthalene-1,4-dione) derivatives starting from lawsone (2-hydroxy-1,4-naphthoquinone) and a variety of (hetero)aromatic aldehydes in ethanol under microwave irradiation. Three of nine synthesized compounds are new. This method provides notable advantages over existing procedures including use of non-traditional basic catalyst and environmentally benign solvent, mild reaction conditions, excellent yields, short reaction time and simple workup.

中文翻译：

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DMAP 催化合成 3,3'-（芳基亚甲基）双（2-羟基萘-1,4-二酮）衍生物的高效便捷方法

首次的4-二甲基氨基吡啶（DMAP）催化的直接的和为3,3'的合成效率的程序已被开发- （芳基亚甲基）双（2-羟基萘-1,4-二酮）从开始指甲花醌衍生物（2-羟基-1,4-萘醌）和乙醇中的各种（杂）芳香醛在微波辐射下。九种合成化合物中的三种是新的。该方法与现有方法相比具有显着优势，包括使用非传统碱性催化剂和环境友好的溶剂，反应条件温和，收率高，反应时间短，后处理简单。