| abstract |
Hydroxypolyamides can be obtained in a simple and economical way in a chloride-free manner when n (a) aromatic amino hydroxy carboxylic acids or n (b) aromatic diaminodihydroxy compounds and aromatic dicarboxylic acids or n (c) aromatic diaminodihydroxy compounds, aromatic dicarboxylic acids and aromatic amino hydroxy carboxylic acids are converted in the presence of 1-ethoxycarbonyl-2-ethoxy-1.2-dihydroquinoline, 1-1'-carbonyldioxy-di-1.2.3-benzotriazole or dicyclohexyl carbodiimide/1-hydroxy-1.2.3-benzotriazole. |