935-46-6Relevant articles and documents
99.Transferts d'hydrogenes dans les cations radicaux ethylene-acetals derives de cyclopentanones et cyclohexanones
Audier, H. E.,Tabet, J. C.,Fetizon, M.
, p. 903 - 911 (2007/10/02)
Hydrogen Transfer during Decompositions of Molecular Ions of Acetals Derived from Substituted Cyclopentanones and Cyclohexanones.The isomerisation process of ethylene-acetal radical ions of low internal energy has been reinvestigated in more detail .The ring contraction of cyclohexane derivatives into methylcyclopentanes is quite general for these ions.The relative rates of H transfers to the C free resulting from C-C cleavage α to the acetal group plays the most important part in the mechanism.
REACTIONS DE TRANSCETALISATION-III. APPROCHE QUANTITATIVE DE LA SELECTIVITE ET DU RENDEMENT POUR LES MOLECULES DIFONCTIONNELLES.
Bauduin, G.,Bondon, D.,Pietrasanta, Y.,Pucci, B.
, p. 245 - 254 (2007/10/02)
Evidence for an intramolecular transketalization equilibrium in a polyfunctional molecule is described.Using thermodynamic rules, it is possible to establish mathematical equations linking yields with relative ketalization energies and excess of reagent.Experiments with simple compounds are in good agreement with the results obtained from the mathematical model.Thus, for any bifunctional molecule, one can calculate the relative ketalization energy of each function from a simple experiment, and then determine the nature and the excess of the reagent which are necessary to realize the transketalization reaction in the best conditions of yield or selectivity.
