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Title:
PURIFICATION METHOD AND PRODUCTION METHOD OF DIFLUOROMETHYL-1, 2, 2, 2-TETRAFLUOROETHYL ETHER
Document Type and Number:
WIPO Patent Application WO/2019/123834
Kind Code:
A1
Abstract:
A purification method of desflurane (difluoromethyl-1, 2, 2, 2-tetrafluoroethyl ether represented by formula (1)) according to the present invention comprises a step wherein a mixture containing desflurane and a trihalomethane is brought into contact with a base in the presence of a phase transfer catalyst so as to decompose the trihalomethane. By this method, only a trihalomethane, which is a by-product contained in desflurane, is able to be decomposed without decomposing the desflurane, thereby achieving high-purity desflurane.

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Inventors:
NISHIZAWA ERI (JP)
AKIBA SHINYA (JP)
Application Number:
PCT/JP2018/039795
Publication Date:
June 27, 2019
Filing Date:
October 26, 2018
Export Citation:
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Assignee:
CENTRAL GLASS CO LTD (JP)
International Classes:
C07C41/44; C07C41/22; C07C41/38; C07C43/12; C07B61/00
Foreign References:
JPH10101595A1998-04-21
JPH11180923A1999-07-06
JPH11246459A1999-09-14
JPH04273839A1992-09-30
JP2008530118A2008-08-07
JPH09501694A1997-02-18
JP2009286731A2009-12-10
JPH01301636A1989-12-05
JPS60112724A1985-06-19
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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