Jx Nippon Oil Energy Corporation

Akira Shibashi

Shinichi Komatsu

Takaya Matsumoto

Daisuke Watanabe

Rieko Fujishiro

Miki Fujiwara

A method for producing an ester compound includes reacting a compound having at least one cyclic structure of a norbornene ring and a norbornadiene ring with an alcohol and carbon monoxide by using a palladium catalyst and an oxidizing agent, to thereby introduce ester groups to carbon atoms forming a double bond in the cyclic structure and obtaining the ester compound, wherein the palladium catalyst includes a palladium acetate having a nitrite ligand in an amount of 10% by mole or more in terms of metal, and the palladium acetate having a nitrite ligand is represented by the general formula (1): Pd(CHCOO)(NO).

Method for producing ester compound and palladium catalyst used in the method

A polyimide containing at least one of repeating units represented by the following general formulae (1) and (2): wherein the formulae (1) and (2), R, R, and Reach independently represents a hydrogen atom or the like, Rrepresents an aryl group having 6 to 40 carbon atoms, and n represents an integer of 0 to 12, wherein a total amount of the repeating units represented by the general formulae (1) and (2) is 90% by mole or more relative to all repeating units.

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Tokyo, Japan

Akira Shibashi