| 摘要 |
A cyclic polycarboxylic anhydride, a polycarboxylic acid, or a mixture of these is reacted with hydroxylamine or a salt thereof in an organic solvent under dehydrating conditions to obtain the corresponding cyclic N-hydroxyimide compound. The cyclic polycarboxylic anhydride may be succinic anhydride, glutaric anhydride, etc. The polycarboxylic acid may be succinic acid, glutaric acid, adipic acid, etc. It is preferable in this method that an organic solvent capable of undergoing azeotropy with water be used as all or part of the reaction solvent and the reaction be conducted while the water present in the reaction system is kept being removed by azeotropy with the organic solvent. According to the method, a cyclic N-hydroxyimide compound can be produced in a satisfactory yield from either a cyclic polycarboxylic anhydride or a polycarboxylic acid. |
