METHOD FOR PRODUCING CYCLOBUTANE TETRACARBOXYLIC ACID DERIVATIVE

• Main Authors: SHIMADA JUNPEI, KONDO MITSUMASA
• Format: Patent
• Language: English; Korean
• Published: 17.08.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; HETEROCYCLIC COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

폴리이미드 등의 원료로서 유용한, 시클로부탄테트라카르복실산-1,2 : 3,4-2 무수물 유도체의 고수율의 제조 방법의 제공. 하기 식 (1) 로 나타내는 무수 말레산 화합물을, 그 무수 말레산 화합물에 대하여, 100 질량 배 이상의 반응 용매 중에서 광 2 량화 반응시키는 것에 의한 식 (2) 로 나타내는 1,2,3,4-시클로부탄테트라카르복실산-1,2 : 3,4-2 무수물의 제조 방법. [화학식 1] TIFFpat00007.tif39103 (식 중, R 은 탄소수 1 ∼ 20 의 알킬기를 나타낸다.) Provided is a method for producing, at high yield, a cyclobutane tetracarboxylic acid-1,2:3,4-dianhydride derivative which is useful as a raw material of polyimide or the like. The present invention is a method for producing a 1,2,3,4-cyclobutane tetracarboxylic acid-1,2:3,4-dianhydride represented by formula (2) by photodimerization of a maleic anhydride compound represented by formula (1) in a reaction solvent of 100 mass doublings or more with respect to the maleic anhydride compound. (1) (2) (In the formula, R is an alkyl group having 1 to 20 carbon atoms.)