5904-71-2Relevant articles and documents
Ultrafine Copper Oxide Particles Dispersed on Nitrogen-Doped Hollow Carbon Nanospheres for Oxidative Esterification of Biomass-Derived 5-Hydroxymethylfurfural
Gupta, Shyam Sunder R.,Vinu, Ajayan,Kantam, Mannepalli Lakshmi
, p. 259 - 269 (2021/03/01)
One-pot synthesis of furan-2,5-dimethylcarboxylate (FDMC) from 5-hydroxymethylfurfural (HMF) is highly demanding for the commercial production of polyethylene furanoate (PEF). Herein, a direct synthesis of FDMC is reported from oxidative esterification of HMF using ultrafine CuO particles dispersed on nitrogen-doped hollow carbon nanospheres (CuO/N?C?HNSs) as a catalyst and tert-butyl hydroperoxide (TBHP) as an oxidizing and methylating reagent. The CuO/N?C?HNSs was prepared through a template protection-sacrifice strategy using SiO2 as a sacrificial template and histidine as the precursor for N and C. N-doping facilitated a strong interaction between the support and copper species, affording formation of CuO nanoparticles of less than 10 nm in size. By virtue of the highly dispersed CuO nanoparticles and a high BET surface area 373 m2/g, the CuO/N?C?HNSsshows excellent catalytic performance in the selective conversion of HMF into FDMC affording 93 % yield of the desired product with a TON value of 49. Furthermore, the oxidative esterification involving SP3C?H bond functionalization is also demonstrated using the same catalyst.
Method for preparing 5 - by catalyzing 2-hydroxymethylfurfural oxidation esterification and 5 -furandicarboxylic acid dimethyl ester (by machine translation)
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Paragraph 0095-0108; 0115-0122, (2020/07/02)
To the method, 5 - hydroxymethyl furfural is contacted with a transition metal catalyst under the condition of an oxidizing atmosphere, and 2 5 - 5 - 2 5 - furandicarboxylic acid dimethyl ester is obtained. To the method, 5 - hydroxymethyl furfural is efficiently and selectively catalytically oxidized and esterified to 2 and 5 - furandicarboxylic acid dimethyl ester without an alkali additive. (by machine translation)
PROCESS FOR PURIFYING AN ACID COMPOSITION COMPRISING 2-FORMYL-FURAN-5-CARBOXYLIC ACID AND 2,5-FURANDICARBOXYLIC ACID
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Page/Page column 10; 11, (2015/03/16)
An acid composition comprising 2-formyl-furan-5-carboxylic acid and 2,5-furandicarboxylic acid is purified in a process which comprises; contacting the acid composition with an alcohol to obtain an esterified composition; and separating the ester of 2-formyl-furan-5-carboxylic acid from the esterified composition to obtain a purified esterified product; and contacting the purified esterified composition with water for saponification or hydrolysis, to obtain a product composition, comprising 2,5-furandicarboxylic acid and a reduced amount of 2-formyl-furan-5-carboxylic acid.