6053-68-5Relevant articles and documents
A 1, 2, 3, 4 - cyclopentane tetracarboxylic dianhydride of the preparation method (by machine translation)
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Page/Page column 3-6, (2019/05/04)
The invention discloses a 1, 2, 3, 4 - cyclopentane tetracarboxylic dianhydride of the preparation method, the invention belongs to the field of fine chemicals preparation method. The main technical proposal is to maleic anhydride and the cyclopentadiene as the starting material, the low temperature by 1, 4 - addition reaction intermediate of synthesis of 5 - norbornene - 2, 3 - dicarboxylic acid anhydride; through the ozone oxidation, hydrolysis, hydrogen peroxide oxidation reaction to obtain the cyclopentane tetracarboxylic acid; finally to acetic anhydride as the dehydrating agent, the dehydration ring-closure of the synthesized target product 1, 2, 3, 4 - cyclopentane tetracarboxylic dianhydride. The proposal to the traditional process, mild reaction conditions, the product has high purity, high yield, pollution-free and the like, and is suitable for large-scale industrial production. (by machine translation)