Title:
METHOD FOR PRESERVATION OF α, α-DIFLUOROACETALDEHYDE ALKYL HEMIACETAL
Document Type and Number:
WIPO Patent Application WO/2018/016126
Kind Code:
A1
Abstract:
A method for preserving, in an oxygen (O2) or inert gas atmosphere in an airtight container, an α,α-difluoroacetaldehyde alkyl hemiacetal represented by the formula in a gas-liquid state comprising a gas phase and a liquid phase, characterized by comprising a step in which the oxygen concentration in the gas phase part of the container is adjusted to be at most 5000ppm, and the α,α-difluoroacetaldehyde alkyl hemiacetal is preserved in the container under light-shielding conditions. [In the formula, R1 represents an alkyl group or a substituted alkyl group.] This method makes it possible to suppress changes in the difluoroacetic acid in the α,α-difluoroacetaldehyde alkyl hemiacetal over long periods of time.
Inventors:
KIMURA MASATO (JP)
AKIBA SHINYA (JP)
TAKEDA MASAAKI (JP)
TANAKA KAZUKI (JP)
FUJIMOTO MASATAKA (JP)
AKIBA SHINYA (JP)
TAKEDA MASAAKI (JP)
TANAKA KAZUKI (JP)
FUJIMOTO MASATAKA (JP)
Application Number:
PCT/JP2017/011564
Publication Date:
January 25, 2018
Filing Date:
March 23, 2017
Export Citation:
Assignee:
CENTRAL GLASS CO LTD (JP)
International Classes:
C07C41/58; C07C43/317
Domestic Patent References:
| WO2016017318A1 | 2016-02-04 | |||
| WO2014115801A1 | 2014-07-31 | |||
| WO2014115801A1 | 2014-07-31 | |||
| WO2016017318A1 | 2016-02-04 |
Foreign References:
| JP2007145766A | 2007-06-14 | |||
| JP2002179605A | 2002-06-26 | |||
| JPH10338655A | 1998-12-22 |
Other References:
JOURNAL OF ORGANIC CHEMISTRY, vol. 62, no. 25, 1997, pages 8826 - 8834
SYNTHETIC ORGANIC CHEMISTRY, vol. 19, no. 3, 1961, pages 254 - 260
ANGEW. CHEM. INT. ED., vol. 52, 2013, pages 2538 - 2542
ORGANOMETALLICS, vol. 31, 2012, pages 5239 - 5242
ANGEW. CHEM. HIT. ED., vol. 51, 2012, pages 2772 - 2775
ANGEW. CHEM. HIT. ED., vol. 45, 2006, pages 1113 - 1115
See also references of EP 3290400A4
SYNTHETIC ORGANIC CHEMISTRY, vol. 19, no. 3, 1961, pages 254 - 260
ANGEW. CHEM. INT. ED., vol. 52, 2013, pages 2538 - 2542
ORGANOMETALLICS, vol. 31, 2012, pages 5239 - 5242
ANGEW. CHEM. HIT. ED., vol. 51, 2012, pages 2772 - 2775
ANGEW. CHEM. HIT. ED., vol. 45, 2006, pages 1113 - 1115
See also references of EP 3290400A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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