Title:
CRYSTAL OF ALKALI METAL N-ACETYLNEURAMINATE ANHYDRATE, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/017677
Kind Code:
A1
Abstract:
The present invention can provide: a crystal of an alkali metal N-acetylneuraminate anhydrate; and a method for producing a crystal of an alkali metal N-acetylneuraminate anhydrate, said method being characterized by comprising: adding or dropwisely adding a solvent selected from the group consisting of an alcohol and a ketone to an aqueous N-acetylneuraminic acid solution containing an alkali-metal-containing compound and having a pH value of 3.0 to 9.0 to cause a crystal of an alkali metal N-acetylneuraminate anhydrate to precipitate; and collecting the crystal of the alkali metal N-acetylneuraminate anhydrate from the aqueous solution.
Inventors:
FUKUMOTO KAZUNARI (JP)
ABE MASAHIRO (JP)
ABE MASAHIRO (JP)
Application Number:
PCT/JP2015/071475
Publication Date:
February 04, 2016
Filing Date:
July 29, 2015
Export Citation:
Assignee:
KYOWA HAKKO BIO CO LTD (JP)
International Classes:
C07H7/027; C07H13/06; C30B7/14; C30B29/54
Foreign References:
| JPH02235897A | 1990-09-18 | |||
| JPS6328411B2 | 1988-06-08 |
Other References:
OGURA, H. ET AL.: "Stereochemical Characterization of Hydrated and Dehydrated Crystals of N-Acetylneuraminic Acid as Revealed by The IR, CD , and 13C Cross Polarization-Magic Angle Spinning NMR Spectroscopy", CHEMISTRY LETTERS, vol. 13, no. 6, 1984, pages 1003 - 1006, XP055390020
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