6132-37-2Relevant articles and documents
Synthesis of [2,2’]Bifuranyl-5,5’-dicarboxylic Acid Esters via Reductive Homocoupling of 5-Bromofuran-2-carboxylates Using Alcohols as Reductants?
Jiang, Huanfeng,Luo, Jiajun,Xie, Yi,Yin, Biaolin,Yu, Bin
, p. 62 - 68 (2020/12/09)
Herein, we describe an environmentally benign and cost-effective protocol for the synthesis of valuable bifuranyl dicarboxylates, starting with α-bromination of readily accessible furan-2-carboxylates by LiBr and K2S2O8. Furthermore, the bromination intermediate product 5-bromofuran-2-carboxylates were then conducted in a palladium-catalyzed reductive homocoupling reactions in the presence of alcohols to afford bifuranyl dicarboxylates. One of the final products in this protocol, [2,2’]bifuran-5,5’-dicarboxylic acid esters, are essential monomers of poly(ethylene bifuranoate), which can be served as an green and versatile alternative polymer for traditional poly(ethylene terephthalate) that is currently common in technical plastics.
Method for preparing 2,5-furandicarboxylic acid
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, (2017/08/29)
The invention discloses a method for preparing 2,5-furandicarboxylic acid. The method comprises the following steps: preparing the 2,5-furandicarboxylic acid by sequentially performing four-step reaction namely bromination reaction, esterification reaction, carbonylation reaction and hydrolysis reaction on furan-2-carboxylic acid, wherein a compound as shown in Formula 3, a compound as shown in Formula 4 and a compound as shown in Formula 5 are obtained by the bromination reaction, the esterification reaction and the carbonylation reaction respectively. Compared with the prior art, the invention can effectively solve the problem of not high yield or severe reaction condition requirement by improving the key overall process flow of the preparation method and reaction conditions of each step. The structural formulae of the compound as shown in Formula 3, the compound as shown in Formula 4 and the compound as shown in Formula 5 are as shown in the specification respectively.
Regioselective oxidative Pd-catalysed coupling of alkylboronic acids with pyridin-2-yl-substituted heterocycles
Wippich, Julian,Schnapperelle, Ingo,Bach, Thorsten
supporting information, p. 3166 - 3168 (2015/06/11)
A total of 19 alkylated heterocycles (thiophenes, benzothiophenes, pyrroles, furans) were prepared (36-99% yield) from the respective pyridin-2-yl-substituted precursors employing alkylboronic acids as the C-H alkylating reagents in an oxidative (Ag2