Pyrones or pyranones are a class of heterocyclic chemical compounds. They contain an unsaturated six-membered ring, which has one oxygen atom and a ketone functional group. [1] . There are two isomers denoted as 2-pyrone and 4-pyrone.

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）。

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 。

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.

Pyrone is a class of fungal specialized metabolites that contain a pyrone moiety with a ketone group, and it includes α-pyrones, β-pyrones, γ-pyrones, chromones, and naphthopyrones. From: Phytochemistry, 2023

Pyrone is a yellowish, crystalline substance at room temperature with a sweet, pleasant odor. Its molecular formula is C 5 H 4 O 2, and its molar mass is 96.08 g/mol. It’s relatively stable under normal conditions but will decompose upon heating to produce harmful fumes of carbon monoxide and carbon dioxide.

2021年10月30日 · Owing to its exquisite chemical and physical properties, the synthesis and further transformations of 2-pyrones have attracted considerable attention over the past decade, showcasing transition metal and metal free strategies and using readily available starting materials, notably those stemming from renewable resources.

2017年7月1日 · The investigations in the chemistry and biology of α-pyrone (2-pyrone) are of vital importance as they constitute an essential pharmacophore in many naturally occurring and biologically active synthetic agents. They are a promising class of biorenewable platform chemicals that provide access to an array of chemical products and intermediates.

2004年8月1日 · These studies demonstrate that 4-phenylethynyl-, 4-tetrahydropyranylpropargyl ether- and 4-ethynyl-6-methyl-2-pyrones have excellent potential as a new class of anticancer agents. 4-Bromo-6-methyl-2-pyrone is a versatile substrate for Negishi, Suzuki and Sonogashira cross-coupling reactions.

2024年8月6日 · α-Pyrones are naturally occurring unsaturated lactones with promising bioactivities, such as antimicrobial, cytotoxic, anti-tuberculosis, antioxidant, anti-inflammatory, anti-HIV, and antidiabetic. These kinds of compounds have frequently been reported from different natural sources including fungi, bacteria, and plants.