吡喃酮（英文名称pyrone）是吡喃的酮类衍生物，是一类六元的含氧杂环化合物。 与吡喃一样，根据环中双键和羰基的位置不同，吡喃酮可以有两个异构体：即α-吡喃酮（α-pyrone）和γ-吡喃酮（γ-pyrone）。

2-Pyrone (α-pyrone or pyran-2-one) is an unsaturated cyclic chemical compound with the molecular formula C 5 H 4 O 2. It is isomeric with 4-pyrone. 2-Pyrone is used in organic synthesis as a building block for more complex chemical structures because it may participate in a variety of cycloaddition reactions to form bicyclic lactones.

There are two isomers denoted as 2-pyrone and 4-pyrone. The 2-pyrone (or α-pyrone) structure is a lactone and is found in nature as part of the coumarin ring system. 4-Pyrone (or γ-pyrone) is found in some natural chemical compounds such as chromone, maltol and kojic acid.

2021年10月30日 · Moreover, the privileged heterocyclic structure of 2-pyrones, accommodating the chemical behavior of conjugated dienes, lactones and arenes (30–35 % resonance energy of benzene 7), has been widely exploited for the synthesis of value-added products in synthetic organic, polymer, and medicinal chemistry 9 Herein, the versatile reactivity of ...

Addition of catalytic amounts of silver salt induces cyclization to 2-pyrones. Depending on the reaction temperature, either 6-triazenyl or 5-triazenyl 2-pyrones are selectively formed. The triazenyl unit is subsequently replaced by a variety of valuable groups in a one-pot process yielding for instance 2-fluoro pyrones.

2017年7月1日 · 2-pyrone is a promising class of biorenewable core scaffolds that provide access to a wide array of intermediates and chemical products. They undergo a range of chemical reactions unique to their structure where the final products formed depends on the type of solvent used and the acidity of the reaction environment [9].

2021年9月23日 · We have summarized recent developments in the synthesis of 2-pyrone and its derivatives and their potential applications. With regard to synthetic approaches, the focus has been on metal-free and transition metal-catalyzed reactions.

吡喃酮 （Pyrone）是 吡喃 的 酮 类 衍生物，是一类六元的含 氧 杂环化合物。 与吡喃一样，根据环中 双键 和 羰基 的位置不同，吡喃酮可以有两个 异构体： α-吡喃酮 （英语：2-Pyrone） 和 γ-吡喃酮。

2015年3月1日 · The present review summarizes the recent progresses in the synthesis of 2-pyrones and the application to the synthesis of marine natural products. Especially, much attention was placed on the...

Polymer-supported DMAP catalyzes a one-pot synthesis of diversely substituted α-pyrones. The cascade approach involves C5 conjugate addition of 5 H -oxazol-4-ones to α,β-unsaturated-β-ketoesters followed by lactonization/elimination.