One-Pot FDCA Diester Synthesis from Mucic Acid and Their Solvent-Free Regioselective Polytransesterification for Production of Glycerol-Based Furanic Polyesters
作者:Deyang Zhao、Frederic Delbecq、Christophe Len
DOI:10.3390/molecules24061030
日期:——
5-furandicarboxylate (PDGF)-was realized through a Co(Ac)₂·4H₂O catalyzed polytransesterification performed at 160 °C between DEFDC and a defined diol furan-based prepolymer or pure diglycerol. In parallel to polymerization process, an unattended regioselective 1-OH acylation of glycerol by direct microwave-heated FDCA diester transesterification led to the formation of a symmetric prepolymer ready for further polymerization
研究了从粘液酸开始合成呋喃-2,5-二羧酸二乙酯(DEFDC)的一站式两步程序,无需分离中间体呋喃二羧酸(FDCA)。然后,生产了三种不同的呋喃基聚酯-聚乙烯2,5-呋喃二羧酸酯(PEF),聚氢丙基2,5-呋喃二羧酸酯(PHPF)和聚甘油2,5-呋喃二甲酸酯(PDGF)-通过在160℃在DEFDC和确定的基于二醇呋喃的预聚物或纯的二甘油之间进行的Co(Ac)2·4H 2 O催化的酯交换反应而实现的。与聚合过程并行,通过直接微波加热的FDCA二酯酯基转移进行的甘油的无人参与的区域选择性1-OH酰化反应导致形成了对称的预聚物,可以进行进一步的聚合,并通过2D NMR序列进行了明确识别。此外,还实现了更可溶和亲水性的基于甘油的呋喃基聚酯的合成。通过NMR,FT-IR光谱,DSC,TGA和XRD表征所得的基于生物的聚合物。通过FE-SEM观察得到的聚合物的形态,并通过EDX观察材料的纯度。