| 摘要 |
<p>The present invention deals with novel substituted benzylated malonic acid esters and a process for their preparation. Esters of 3,5-dihydrocarbyl-4-hydroxybenzyl-malonic acid are prepared by reacting an N,N-dihydrocarbyl-2,6-dihydrocarbyl-4-aminomethylphenol with an ester of a 1,3-dicarboxylic acid in the presence of an alkali or an alkaline earth metal hydride. The resulting substituted benzylated malonic acid esters are useful as antioxidants into polymers, latices, liquid hydrocarbon fuels and lubricating oils.</p> |
