53662-83-2Relevant articles and documents
Method for preparation of 2, 5-furandicarboxylic acid diester compound from 5-hydroxymethylfurfural
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Paragraph 0025-0026; 0034-0035, (2019/12/31)
The invention discloses a method for preparation of a 2, 5-furandicarboxylic acid diester compound from 5-hydroxymethylfurfural. The method uses a cheap and specific non-noble metal as the catalyst, and adopts cheap and easily available oxygen or air as an oxygen source to prepare high purity dimethyl furan-2, 5-dicarboxylate at high efficiency under mild reaction conditions, thus solving the problems of low reaction efficiency, low product yield, high cost and the like in the prior art, and has good application prospects.
METHODS FOR PREPARING 2,5-FURANDICARBOXYLIC ACID
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Paragraph 0265; 0266: 0267; 0268, (2013/04/13)
Provided are methods of producing 2,5-furandicarboxylic acid (FDCA) from renewable sources such as seaweed, alginate, oligoalginate, pectin, oligopectin, polygalacturonate, galacturonate, and/or oligogalacturonate. The sugars in the renewable sources can be converted into one or more intermediates such as 4-deoxy-L-erythro-5- hexoseulose uronate (DEHU), 4-deoxy-L-threo-5-hexosulose uronate (DTHU), 5- hydroxymethyl furfural (HMF), 2,5-dihydroxymethyl furan (DHMF), and 5-formyl-2- furancarboxylic acid (FFA), which can be converted into FDCA by dehydration and cyclization to produce 5-formyl-2-furancarboxylic acid (FFA), followed by oxidation to produce FDCA. DEHU or DTHU may also be converted into FDCA by oxidation to produce 2,3-dihydroxy-5-oxohexanedioic acid (DOHA), which then undergoes dehydration and cyclization to produce FDCA.