METHOD FOR PURIFYING PYRUVIC ACID COMPOUNDS

Title:

METHOD FOR PURIFYING PYRUVIC ACID COMPOUNDS

Document Type and Number:

WIPO Patent Application WO/1998/015520

Kind Code:

A1

Abstract:

A method for purifying pyruvic acid compound, comprising the steps of reacting a pyruvic acid compound represented by general formula (I) [wherein R?1� represents an optionally substituted lower alkyl group, a lower alkenyl group, a lower alkynyl group, a cycloalkyl group, an aryl group, or a heterocyclic group; and R?2� represents a lower alkyl group] with a bisulfite represented by the general formula (II): MHSO�3? [wherein M represents NH�4? or an alkali metal] to prepare an adduct of the acid compound with the salt, and decomposing the adduct with an acid. This method enables pyruvic acid compounds to be purified in a simple manner without using purification methods such as distillation or column chromatography, and hence is advantageous as an industrial production process.

More Like This:

JP3593317	Microencapsulated metal catalyst
JP3665655	PREPARATION OF DIALKYL CYCLOPROPANE-1,1-DICARBOXYLATE AND NOVEL DIALKYL DICARBOXYLATE
WO/2004/029004	COMPOSITIONS CONTAINING IONIC LIQUIDS AND USES THEREOF, ESPECIALLY IN ORGANIC SYNTHESIS

Inventors:

USHIO HIDEKI (JP)
HAZAMA MOTOO (JP)
YAGI TOSHIKAZU (JP)
NAKAMURA AKIHIKO (JP)
MIZUNO MASAHIKO (JP)

Application Number:

PCT/JP1997/003595

Publication Date:

April 16, 1998

Filing Date:

October 08, 1997

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SUMITOMO CHEMICAL CO (JP)
USHIO HIDEKI (JP)
HAZAMA MOTOO (JP)
YAGI TOSHIKAZU (JP)
NAKAMURA AKIHIKO (JP)
MIZUNO MASAHIKO (JP)

International Classes:

C07C67/343; C07C67/60; (IPC1-7): C07C69/716; C07C67/60; C07C67/313

Foreign References:

JPH0334938A	1991-02-14
JPH04210941A	1992-08-03

Other References:

BULL. CHEM. SOC. JPN., 1967, Vol. 40, OMOTE YOSHIMORI et al., "Synthesis of 3-Alkyl-N-Hydroxyindole-2-Carboxyclic Acid", pages 2703-2704.
COMPREHENSIVE ORGANIC CHEMISTRY, Vol. 3, 1957, Supervised by MUJIO KOTAKE, ASAKURA SHOTEN, KOZO ASAKURA, "Aliphatic Compounds II (in Japanese)", pages 56, 57, 69.

Attorney, Agent or Firm:

Aoyama, Tamotsu (IMP Building 3-7, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 540, JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: A PROCESS FOR THE RECOVERY OF LACTIC ACID

Next Patent: METHOD FOR PREPARING TRANS-4-(4-AMINOMETHYLPHENYL) CYCLOHEXANOL DERIVATIVES