title: Invertase-catalyzed reactions in alcoholic solutions.
abstract: The formation of alkyl beta-D-fructofuranosides by invertase from sucrose in aqueous solutions of methanol, ethanol, or n-propanol is studied for the dependence on alcohol and invertase concentrations as well as on reaction time. The yield of alkyl beta-D-fructosides is shown to be controlled by three competitive reactions: the alcoholysis of sucrose, the hydrolysis of sucrose, and the hydrolysis of alkyl beta-D-fructosides. Both the conversion rate of sucrose and the fraction of alkyl beta-D-fructosides in the product mixture are dependent on the chain length of the alcohols. They decrease in the sequence methanol > ethanol > n-propanol. Alkyl beta-D-fructosides are also formed by invertase starting from alcoholic solutions of fructose.
authors.affiliation: Department of Biotechnology, Martin-Luther University, DDR-4020 Halle, German Democratic Republic.
authors.forename: B
authors.initials: B
authors.lastname: Selisko
authors.forename: R
authors.initials: R
authors.lastname: Ulbrich
authors.forename: A
authors.initials: A
authors.lastname: Schellenberger
authors.forename: U
authors.initials: U
authors.lastname: Müller