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Ethenone reacts with methanal in the presence of catalysts such as Lewis acids (AlCl 3, ZnCl 2 or BF 3) to give β-propiolactone. [21] The technically most significant use of ethenone is the synthesis of sorbic acid by reaction with 2-butenal (crotonaldehyde) in toluene at about 50
Ketenes are unstable and cannot be stored. In the absence of nucleophiles with which to react, ethenone dimerises to give β-lactone, a cyclic ester. If the ketene is disubstituted, the dimerisation product is a substituted cyclobutadione. For monosubstituted ketenes, the dimerisation could afford either the ester or the diketone product.
Synthesis. Alkynols may be formed by the alkynylation of carbonyl compounds, usually in liquid ammonia. [2] ... Ethenone: Literature. Allinger, Cava, ...
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH 3 CO) 2 O.Commonly abbreviated Ac 2 O, it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis.
β-Propiolactone, often simply called propiolactone, is an organic compound with the formula CH 2 CH 2 CO 2.It is a lactone family, with a four-membered ring. It is a colorless liquid with a slightly sweet odor, highly soluble in water and organic solvents.
Ethylene dione or ethylenedione, also called dicarbon dioxide, Carbon peroxide, ethenedione, or ethene-1,2-dione, is a chemical compound with the formula C 2 O 2 or O=C=C=O.It is an oxide of carbon (an oxocarbon), and can be described as the carbon-carbon covalent dimer of carbon monoxide. [1]
β-Butyrolactone is obtained in 63% yield by the addition of ethanal to ethenone (ketene) in the presence of the clay mineral montmorillonite. [4] Synthese von β-Butyrolacton aus Keten. For this purpose, ethenone can also be produced in-situ by dehydrobromination of acetyl bromide with the Hünig base diisopropylethylamine.
Barton-Kellogg reaction molecular motor synthesis. The main advantage of this reaction over the McMurry reaction is the notion that the reaction can take place with two different ketones. In this regard the diazo-thioketone coupling is a cross-coupling rather than a homocoupling.