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Title:
METHOD FOR PREPARING 5-HYDROXY-1,3-DIOXANE AND METHOD FOR PREPARING BRANCHED GLYCEROL TRIMERS USING 5-HYDROXY-1,3-DIOXANE AS A RAW MATERIAL
Document Type and Number:
WIPO Patent Application WO/2013/035899
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing 5-hydroxy-1,3-dioxane (α, α'-isomer of glycerol formal) which is very suitable as a raw material for branched glycerol, and more particularly, to a method for preparing 5-hydroxy-1,3-dioxane, comprising the steps of: using, as a starting material, a mixture of 5-hydroxy-1,3-dioxane and 4-hydroxymethyl-1,3-dioxolane, preferably adding glycerol, and then heating the mixture at 40-100°C in the presence of a concentrated sulfuric acid as an acid catalyst to obtain a mixture in which the proportion of 5-hydroxy-1,3-dioxane is higher than that in the starting material; and allowing pivaloyl chloride and trityl chloride to react with the mixture having the increased proportion of 5-hydroxy-1,3-dioxane, thereby performing separation and purification of unreacted 5-hydroxy-1,3-dioxane through distillation or extraction.

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Inventors:
NEMOTO HISAO (JP)
HATTORI HATSUHIKO (JP)
Application Number:
PCT/KR2011/006631
Publication Date:
March 14, 2013
Filing Date:
September 07, 2011
Export Citation:
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Assignee:
KOREA TECHNO AGENCY CO LTD (KR)
UNIV TOKUSHIMA (JP)
NEMOTO HISAO (JP)
HATTORI HATSUHIKO (JP)
International Classes:
C07D319/06; C07B63/00
Domestic Patent References:
WO2008093655A12008-08-07
WO2010022263A22010-02-25
Foreign References:
EP1666486A12006-06-07
Other References:
HISAO NEMOTO ET AL.: "An efficient and practical method for the preparation of a brached oligoglycerol with acetonide protection groups", CHEMISTRY LETTERS, vol. 39, no. 8, 2010, pages 856 - 857
HISAO NEMOTO ET AL.: "Synthesis of Branched Heptaglycerol Bearing Eight Hydroxyl Groups with Four Cyclic Protecting Groups", SYNLETT, no. 13, 2007, pages 2091 - 2095
Attorney, Agent or Firm:
ERUUM PATENT LAW FIRM (KR)
특허법인 이룸 (KR)
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