Acidolysis Reactions Lead to Esterification of Endogenous Tocopherols and Compromised Oxidative Stability of Modified Oils
作者:Fayez Hamam、Fereidoon Shahidi
DOI:10.1021/jf061730e
日期:2006.9.1
through the formation of tocopheryl esters during acidolysis reactions is proposed and confirmed. Tocopherols in the oils were found to react with carboxylic acids present in the medium, thus leading to the formation of tocopheryl esters that do not render any stability to the resultant modified oils as they lack any free hydroxyl groups on the phenolic ring of the molecule. Tocopheryl oleate, used as a standard
In this work we report an unprecedented solvent-free approach for the condensation of carboxylicacids with alcohols and amines mediated by carbodiimides, the most widely adopted coupling agents. The solventless procedure enabled fast and high-yielding reactions at either room temperature or under conventional heating despite the use of a catalytic loading of DMAP as the additive (1–5 mol%), far below
The present invention relates to agents for intra-articular injection that contain a mixture of alpha-tocopherol, phospholipids or poloxamers or sodium oleate, proteoglycans, and a cortisone crystal suspension or a cortisone crystal solution. The agents are suitable for therapy of rheumatic diseases, in particular of arthrosis.