| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for efficiently producing a highly reactive 4-chloroformyl-cyclohexane-1,2-dicarboxylic anhydride. SOLUTION: The method comprises reacting chlorinating agent(s) with cyclohexane-1,2,4-tricarboxylic acid. In this method, the chlorinating agent is at least one selected from the group consisting of phosphorus trichloride, phosphorus pentachloride, phosphoryl chloride, phosgene, trichloromethyl chloroformate, thionyl chloride and benzotrichloride. COPYRIGHT: (C)2004,JPO&NCIPI
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