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| Section2 = | Section7 = }} 2-Furanone, also known as γ-crotonolactone (GCL), is a heterocyclic organic compound. Classified as a lactone, this colourless liquid is colloquially called "butenolide." As a class of compounds, substituted derivatives, which are not in fact prepared from the parent 2-furanone, are called butenolides. ==Synthesis and reactions== 2-Furanone is prepared by oxidation of furfural: :400px It exists in equilibrium with the tautomer 2-hydroxyfuran, which serves as an intermediate in the interconversion between the β- and α-furanones. The β form is the more stable. The interconversion is catalyzed by base. 2-Furanones can be converted to furans by a two-step process of reduction followed by dehydration. First the carbon-oxygen double bond is reduced by trimethylsilylation of the oxygen centre. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2-Furanone」の詳細全文を読む スポンサード リンク
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