Title:
METHOD FOR PRODUCING PYRROLO-QUINOLINE QUINONE CRYSTAL
Document Type and Number:
Japanese Patent JP2017031126
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for easily producing the crystals of low moisture content pyrrolo-quinoline quinone without using long time drying and high temperature treatment, and the high purity crystals.SOLUTION: The free body of pyrrolo-quinoline quinone is dissolved into an aprotic polar solvent, and thereafter, crystals are precipitated to produce the crystals of the free body of the low moisture content pyrrolo-quinoline quinone.SELECTED DRAWING: None
Inventors:
IKEMOTO KAZUTO
Application Number:
JP2015155696A
Publication Date:
February 09, 2017
Filing Date:
August 06, 2015
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO
International Classes:
C07D471/04
Domestic Patent References:
| JP2004300042A | 2004-10-28 | |||
| JP2006508519A | 2006-03-09 |
Foreign References:
| WO2014175327A1 | 2014-10-30 | |||
| WO2011055796A1 | 2011-05-12 | |||
| WO2012070649A1 | 2012-05-31 | |||
| WO2012039474A1 | 2012-03-29 | |||
| WO2014027669A1 | 2014-02-20 | |||
| CN102072942A | 2011-05-25 |
Other References:
ITOH, SHINOBU ET AL.: "Reaction of reduced PQQ(PQQH2) and molecular oxygen", BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, vol. 59, no. 6, JPN6018010589, 1986, pages 1911 - 1914, ISSN: 0003764663
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