The essential focus of the present review is to collect the chemical reactions of chromone derivatives involving their transformation into coumarin derivatives. A diversity of coumarins was efficiently synthesized from the reactions of chromones with some nucleophilic reagents. This review includes the reactions of chromone derivatives with nitrogen and carbon nucleophiles, (acyclic and cyclic) leading to coumarins.

中文翻译：

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色酮化学转化为香豆素

本综述的主要重点是收集色酮衍生物的化学反应，涉及它们转化为香豆素衍生物。色酮与一些亲核试剂的反应有效地合成了多种香豆素。这篇综述包括色酮衍生物与氮和碳亲核试剂（无环和环状）的反应，导致香豆素。