- GREEN, COPPER-CATALYZED DISPROPORTIONATION OF AROMATIC AND HETEROAROMATIC CARBOXYLATES TO DICARBOXYLATES
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The present application relates to a process for preparation of a compound of Formula (I) and Formula (IV): wherein is as described herein; and wherein and R are as described herein.
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Paragraph 0108; 0109
(2020/06/08)
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- Process For The Production Of The Mixture 2,4 Furandicarboxylic Acid (FDCA) And 2,5 Furandicarboxylic Acid Via Disproportionation Reaction, Mixture Of 2,4-FDCA And 2,5-FDCA As A Result Of Disproportination Reaction, 2,4-FDCA Obtained By The Disproportionation Reaction Process And Use Of 2,4-FDCA
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The present invention refers to a process for production of a mixture including 2,4-furandicarboxylic acid (2,4-FDCA) and 2,5 furandicarboxylic acid (2,5-FDCA) through the disproportionation route, using as base compounds oxidation products of furfural. This invention also relates to a process for production of 2,4-FDCA as a result of a disproportionation route and the use of 2,4-FDCA as a monomer or comonomer to synthesize esters or any compounds which can generate macromolecules, such as polyesters.
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Paragraph 0039
(2015/05/05)
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- Concurrent formation of furan-2,5- and furan-2,4-dicarboxylic acid: Unexpected aspects of the Henkel reaction
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The concurrent formation of furan-2,5- and furan-2,4-dicarboxylic acid under solvent free conditions via a disproportionation reaction is described. By reacting potassium-2-furoate at 260 °C in the presence of 22 mol% of (Lewis acidic) catalysts like CdI2 or ZnCl2, potassium-2-furoate is disproportionated to furan and furandicarboxylic acids. Besides furan and furan-2,5-dicarboxylic acid (2,5-FDCA) as the main products, furan-2,4-dicarboxylic acid (2,4-FDCA) is also formed as a by-product. Experimental evidence has been obtained that, under the reaction conditions applied, 2,5-FDCA and 2,4-FDCA are formed by separate reaction pathways. Selectivity towards the different FDCA isomers is affected by the type of catalyst used. Single-crystal X-ray analysis shows that 2,4-FDCA has a more 'linear' character compared to 2,5-FDCA and hence is structurally more comparable to terephthalic acid (TA), making it an interesting monomer for synthetic polyesters.
- Thiyagarajan, Shanmugam,Pukin, Aliaksei,Van Haveren, Jacco,Lutz, Martin,Van Es, Daan S.
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p. 15678 - 15686
(2013/09/12)
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- PROCESS FOR THE PRODUCTION OF A MIXTURE OF 2,4- FURANDICARBOXYLIC ACID AND 2,5- FURANDICARBOXYLIC ACID (FDCA) VIA DISPROPORTIONATION REACTION, MIXTURE OF 2,4-FDCA AND 2, 5 - FDCA OBTAINABLE THEREBY, 2, 4 - FDCA OBTAINABLE THEREBY AND USE OF 2,4- FDCA
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The present invention refers to a process for production of a mix? ture comprising 2,4-furandicarboxyiic acid (2,4-FDCA) and 2,5 furandicar- boxyiic acid (2,5-FDCA) through the disproportionation route, using as base compounds oxidation products of furfural. This invention also relates to a process for production of 2,4-FDCA as a result of a disproportionation route and the use of 2,4- FDCA as a monomer or comonomer to synthesize esters or any compounds which can generate macromolecules, such as polyesters.
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Page/Page column 6; 7
(2013/07/19)
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