| 摘要 |
PROBLEM TO BE SOLVED: To obtain a novel aromatic carboxylic acid derivative and an acid chloride derivative thereof useful as raw materials for highly heat-resistant condensation polymers. SOLUTION: The aromatic carboxylic acid derivative is represented by formula (1) (wherein X<SB>1</SB>and X<SB>2</SB>are each a phenylethynyl, naphthylethynyl, anthrylethynyl, quinolylethynyl, quinoxalylethynyl, ethynyl, alkylethynyl or propargyl ether group; (m) is 1, 2 or 3; and (n) is 0, 1, 2 or 3). COPYRIGHT: (C)2004,JPO&NCIPI
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