GRAPHICAL ABSTRACT ABSTRACT Microwave conditions have been shown to be an efficient, mild and rapid method for a one-pot four-component synthesis of some novel benzo[a]furo[2,3-c]phenazines. Furan annulated heterocycles were obtained using isocyanide, o-phenylenediamine, 2-hydroxynaphthalene-1,4-dione and aromatic aldehydes under catalyst- and solvent-free microwave conditions. This work has the advantage of easy work-up, convenient, relatively short reaction times and the products were isolated with high yields.

中文翻译：

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微波条件下苯并[a]呋喃[2,3-c]吩嗪的新型环保无溶剂四组分合成

图形摘要摘要 微波条件已被证明是一种有效、温和且快速的方法，可用于一锅四组分合成一些新型苯并[a]呋喃[2,3-c]吩嗪。在无催化剂和无溶剂的微波条件下，使用异氰化物、邻苯二胺、2-羟基萘-1,4-二酮和芳香醛获得呋喃环化杂环。该工作具有后处理容易、方便、反应时间相对较短且产物分离收率高的优点。