Thermolysis of sucrose in dimethyl sulphoxide solution
作者:Laurence Poncini、Geoffrey N. Richards
DOI:10.1016/s0008-6215(00)85207-6
日期:1980.12
Abstract The kinetics of thermolysis of sucrose in solution in anhydrous dimethyl sulphoxide have been studied. The reaction appears to be facilitated by intramolecular hydrogen-bonding and is inhibited by intermolecular hydrogen-bonding to water or alcohols. The thermolysis yields α- d -glucopyranose (which then anomerises) and the fructofuranosyl carbonium ion which can react with benzyl alcohol
Thermolysis of sucrose in the presence of alcohols. A novel method for the synthesis of d-fructofuranosides
作者:Wayne Moody、Geoffrey N. Richards
DOI:10.1016/s0008-6215(00)80670-9
日期:1981.11
sucrose is thermolyzed in the presence of alcohols, either neat or in dimethyl sulfoxidesolution, the products are mainly d -glucose and the appropriate alkyl d -fructofuranosides. Conditions have been investigated for optimizing the yields of the latter products, with a view to utilization of the reaction as a synthetic method. Such stericallyhinderedalcohols as 2-methyl-2-propanol and three sterols
Brønsted acidity of ceric ammonium nitrate in anhydrous DMF. The role of salt and solvent in sucrose cleavage
作者:Tonino Caruso、Emiliano Bedini、Cristina De Castro、Michelangelo Parrilli
DOI:10.1016/j.tet.2005.12.001
日期:2006.3
the course of sucrose cleavage by ceric ammonium nitrate (CAN). The formation of a nitrooxy derivative of DMF by reaction with CAN is responsible for this acidity. The reactivity of CAN at 50 °C with several solvents was evaluated by voltammetric and potentiometric measurements. The possible release of protons from these reactions, particularly when aqueous solvent mixtures are used, should always be
furan derivatives. The former products include glycolaldehyde, acetol, dihydroxy-acetone, acetic acid, formic acid, and lactic acid. Mechanistic speculations are made regarding the origins of these compounds, as well as of furan derivatives and saccharinicacid lactones. Parallels with alkalinedegradation are considered.
Conversion of fructose-containing feedstocks to HMF-containing product
申请人:Archer-Daniels-Midland Company
公开号:US10017486B2
公开(公告)日:2018-07-10
The present invention relates generally to processes for converting fructose-containing feedstocks to a product comprising 5-(hydroxymethyl)furfural (HMF) and water in the presence of water, solvent and an acid catalyst. In some embodiments, the conversion of fructose to HMF is controlled at a partial conversion endpoint characterized by a yield of HMF from fructose that does not exceed about 80 mol %. In these and other embodiments, the processes provide separation techniques for separating and recovering the product, unconverted fructose, solvent and acid catalyst to enable the effective recovery and reutilization of reaction components.