Lactones are cyclic carboxylic esters. They are derived from the corresponding hydroxycarboxylic acids by esterification. They can be saturated or unsaturated. [1] Lactones are formed by lactonization, the intramolecular esterification of the corresponding hydroxycarboxylic acids. [2]

γ-Butyrolactone (GBL) or gamma-butyrolactone is an organic compound with the formula O=CO (CH2)3. It is a hygroscopic, colorless, water-miscible liquid with a weak characteristic odor. It is the simplest 4-carbon lactone. It is mainly used as an intermediate in the production of other chemicals, such as N-methyl-2-pyrrolidone. [5]

Y-lactone 2 | C7H10O5 | CID 21674240 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

Mar 26, 2021 · 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.

The carbonyl band of five-membered lactones (y-lactones) is in the range of 1735-1750 cm, while six-membered lactones (6-lactones) absorb in the range of 1760-1780 cm. Five-membered anhydrides show two CO bands at 1770 and 1844 cm, but six-membered anhydrides absorb at 1758 and 1790 cm. ...

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.

A “lactone” is a cyclic ester and has the general structure. By recognizing that the steps in the acidic hydrolysis of an ester are exactly the same as those in a Fischer esterification (but in the reverse order!), you can again minimize the amount of memorization that you must undertake.

Cu/nitroxyl catalysts promote a highly efficient and selective aerobic oxidative lactonization of diols under mild reaction conditions using ambient air as the oxidant.

Lactones are cyclic organic esters of hydroxycarboxylic acid, usually formed when hydrogen or halogen atoms react with any carboxylic group present in the same molecule. All this process is done by intramolecular esterification of hydroxycarboxylic acid. There is a ring containing two or more carbon atoms and just one oxygen atom.

Dec 27, 2021 · A “lactone” is a cyclic ester and has the general structure. By recognizing that the steps in the acidic hydrolysis of an ester are exactly the same as those in a Fischer esterification (but in the reverse order!), you can again minimize the amount of …