| 摘要 |
<p>The ester process for synthesizing antioxidant amides through reaction of an aliphatic or aromatic ester of Formula (A) (FORMULA) with an aromatic amine of Formula (B) (FORMULA) in the presence of a base such as sodium methoxide, has been improved by a modification in the finishing procedure. The old steps of filtering the alkali metal salt reaction product, washing the filter cake, and hydrolyzing with dilute acid have been replaced by an in-situ hydrolysis of the reaction slurry with water. Several advantages are realized, among which are faster hydrolysis and easier filtration. </p> |
