The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.
本发明解决了提供适用于工业生产的2-乙酰-4H,9H-
萘并[2,3-b]
呋喃-4,9-二酮的生产方法的问题。本发明通过使3-溴-3-
丁烯-2-酮和
2-羟基-1,4-萘醌在溶剂存在下反应,然后向反应体系中加入
醇类溶剂和/或
水以获得2-乙酰-4H,9H-
萘并[2,3-b]
呋喃-4,9-二酮的晶体,并通过在溶剂存在下使用特定的吸附剂处理晶体,来生产2-乙酰-4H,9H-
萘并[2,3-b]
呋喃-4,9-二酮。