METHOD FOR PRODUCING BIPHENYL-3, 4, 3', 4'-TETRACARBOXYLIC ACID

METHOD FOR PRODUCING BIPHENYL-3, 4, 3', 4'-TETRACARBOXYLIC ACID

PROBLEM TO BE SOLVED: To provide a method for producing biphenyl-3, 4, 3', 4'-tetracarboxylic acid, by which the objective acid can be produced from inexpensive raw materials in an industrially high yield in excellent productivity. SOLUTION: This method for producing the biphenyl-3, 4, 3&#...

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Bibliographische Detailangaben
Hauptverfasser: NAKATANI NIRO, HAYASHI TAMIO
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for producing biphenyl-3, 4, 3', 4'-tetracarboxylic acid, by which the objective acid can be produced from inexpensive raw materials in an industrially high yield in excellent productivity. SOLUTION: This method for producing the biphenyl-3, 4, 3', 4'-tetracarboxylic acid is characterized by comprising the first process of subjecting 1, 2-dimethyl-4-chlorobenzene to a coupling reaction to produce biphenyl-3, 4, 3', 4'-tetramethyl, and then crystallizing to isolate the biphenyl-3, 4, 3', 4'-tetramethyl, and the second process of oxidizing the biphenyl-3, 4, 3', 4'-tetramethyl and then crystallizing to isolate the biphenyl-3, 4, 3', 4'-tetracarboxylic acid. COPYRIGHT: (C)2009,JPO&INPIT