Kvernberg, Per Olav; Pedersen, Bjoern, Acta Chemica Scandinavica, 1994, vol. 48, # 8, p. 646 - 651
作者:Kvernberg, Per Olav、Pedersen, Bjoern
DOI:——
日期:——
Preparation of dehydro-l-ascorbic acid dimer by air oxidation of l-ascorbic acid in the presence of catalytic amounts of copper(II) acetate and pyridine
作者:Eleftheria K. Koliou、Panayiotis V. Ioannou
DOI:10.1016/j.carres.2004.11.015
日期:2005.2
The catalytic system Cu(ACO)(2)-Pyridine 1:4 mol% in methanol, slowly catalyses the air oxidation of ascorbic acid to the 2-methyl hemi-ketal of dehydroascorbic acid 5, and hydrogen peroxide. However, with Cu(ACO)2-Pyridine 3:4 mol% the air oxidation is quite fast and no hydrogen peroxide is present at the end of the reaction. Removal of the catalyst and refluxing the foamy 5 in MeCN gives the oxidized, dimeric, dehydroascorbic acid in very good yields (similar to70%) contaminated by similar to1-2% MeCN. (C) 2004 Elsevier Ltd. All rights reserved.
Spontaneous stepwise reduction of an organic peroxide by ascorbic acid
作者:Karen F. Jenkins、Susan A. Hershberger、James W. Hershberger、Richard Marshall