Synthesis and Polymerization Reaction of 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride

1,2,3,4-Cyclobutanetetracarboxylic Dianhydride is an important organic chemical raw material, appearing as a white to pale yellow crystalline powder under ambient temperature and pressure, and exhibiting certain hygroscopic and deliquescent properties. As a key intermediate in the pharmaceutical and electronic chemical industries, 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride is a bifunctional compound featuring a four-membered alicyclic structure. It serves as a crucial raw material for synthesizing high-performance polymeric materials such as polyimides, polyesters, alkyd resins, and epoxy resins.

Synthesis

Figure1: Synthesis of 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride

In a glass container of the internal irradiation type, nitrogen purging was performed to establish an inert atmosphere. Within this glass vessel, ethyl acetate (250 g) and maleic anhydride (25.5 g) were combined and thoroughly mixed. Under continuous cooling to maintain the temperature, the reaction mixture was exposed to light irradiation from a high-pressure mercury lamp and allowed to react for approximately 6 hours at about 20°C. After the reaction was complete, the precipitated product was isolated by filtration. The collected solid was subsequently washed with ethyl acetate and then dried under reduced pressure. The target compound 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride, was thus obtained with a yield of 7.8%. [1]

Polymerization Reaction

Figure2: Polymerization Reaction of 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride

In a three-necked flask, 1.2 g of 4,4'-diaminodiphenyl ether (ODA) was accurately weighed and charged. To this flask, 9.51 g of N,N-dimethylacetamide (DMAc) solvent was added under stirring to dissolve the diamine. Subsequently, 1.177 g of 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride was gradually introduced into the reaction mixture in three divided portions to ensure controlled addition and homogeneous dispersion. The resulting mixture was stirred continuously overnight to allow complete polymerization and formation of the poly(amic acid) precursor. Following this, a catalytic amount of quinoline (0.01 mol) was introduced into the reaction system, and stirring was continued for an additional 3 hours to facilitate imidization. Finally, the prepared solution was transferred into a tube furnace and subjected to programmed heating to thermally cyclize the intermediate, thereby yielding the final polyimide product. [2]

Chemical Applications

Preparation of Polyimide Resins

A series of polyimide films were synthesized using 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride (CBDA) and aromatic diamines to evaluate their thermal stability and optical transmittance. The synthetic procedure for 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride was optimized, resulting in a nearly tenfold increase in yield compared to earlier reported methods. X-ray crystallographic analysis confirmed that 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride adopts a cis–trans–cis configuration. The resulting polymer films exhibited outstanding thermal resistance along with high transparency and colorless appearance, making them suitable for practical applications in polymer engineering. In contrast, polymers derived from pyromellitic dianhydride (PMDA) instead of CBDA were deep yellow in color and thus unsuitable for high-quality display materials such as liquid crystal displays. The optical transmittance of polymers prepared from CBDA and aromatic diamines ranged from 81.5% to 85.8%, while the deep-yellow PMDA-based polymers showed significantly lower transmittance values, between 48% and 63.9%. The compound 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride, derived from the photodimerization of maleic anhydride, serves as a versatile intermediate for the production of polyimide resins. Several research groups have documented the synthesis of 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride via photodimerization. A major limitation of these existing preparation methods is the low yield of 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride, which hinders their applicability for industrial-scale production. The dimerization conditions in solution have not been extensively investigated, as undesired side reactions—such as interaction with the solvent or induced/non-induced photopolymerization—often lead to the formation of oligomeric byproducts. We have previously communicated preliminary results on an optimized reaction condition that enables a high yield of CBDA. In the present article, we detail (1) a synthetic approach along with the X‑ray crystal structure of CBDA, and (2) the preparation and physical properties of novel polyimides synthesized from CBDA and aromatic diamines. These polyimides exhibit outstanding optical transparency and elevated thermal decomposition temperatures. [3]

Reference

[1] Eguchi, Yuji, Polyimide with high transparency and good heat resistance, and their manufacture, Japanese Patent, Patent Number:JP2009215363 A.

[2] Zhang, Bo; et al, COMFO: Integrated deep learning model facilitates discovery of multifunctional polyimide materials, Polymer (2025), 320, 128081.

[3] Suzuki H, Abe T, Takaishi K, et al. The synthesis and X‐ray structure of 1, 2, 3, 4‐cyclobutane tetracarboxylic dianhydride and the preparation of a new type of polyimide showing excellent transparency and heat resistance[J]. Journal of Polymer Science Part A: Polymer Chemistry, 2000, 38: 108-116.

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