Lactones are cyclic carboxylic esters. They are derived from the corresponding hydroxycarboxylic acids by esterification . They can be saturated or unsaturated.

2021年3月26日 · This review summarizes the current knowledge on lactones, a class of biologically active natural products isolated from a wide range of living organisms. Butenolide, 5,6-dihydropyran-2-one, and sesquiterpene lactones display an impressive variety of bioactivities and are the most abundant in nature.

Lactone, any of a class of cyclic organic esters, usually formed by reaction of a carboxylic acid group with a hydroxyl group or halogen atom present in the same molecule. Commercially important lactones include diketene and β-propanolactone used in the synthesis of acetoacetic acid derivatives and

Lactones are a special kind of ester in the form of a ring. It is often possible to form them via an internal esterification process.

Lactones that occur naturally are primarily saturated and unsaturated γ- and δ-lactones, but to a lesser extent, macrocyclic lactones. The γ-lactones and δ-lactones are intramolecular esters of the related hydroxy fatty acids. They provide the aroma of …

2024年12月3日 · Carboxylic acid - Lactones, Organic Compounds, Reactions: Cyclic esters are called lactones. In these cases the COOH and OH groups that combine to form water are part of the same molecule (see above Classes of carboxylic acids: Hydroxy and keto acids).

2024年2月16日 · — John Cumbers, Forbes, 12 May 2021 Those similar substances include flavonoids, a group of plant metabolites that have antioxidant effects, and sesquiterpene …

Lactones are basically chemical entities constituted of cyclic carboxylic esters. Natural and synthetic lactones exhibit a broad spectrum of biological activities such as anti-helminthic, anti-microbial, anti-inflammatory, and anti-tumor activities.

Lactones are cyclic organic esters of hydroxycarboxylic acids, usually formed by the reaction of a halogen atom or hydroxyl group with a carboxylic acid group present in the same molecule. These are formed by intramolecular esterification of respective hydroxycarboxylic acids.

Lactones. Lactones always have an oxygen atom double bonded to a carbon atom. The carbon atom is attached to another oxygen atom that is part of a closed ring (Table 3-15). Lactones are present in most expressed oils and tend to end in -lactone or -ine.