Synthesis of Furandicarboxylic Acid Esters From Nonfood Feedstocks Without Concomitant Levulinic Acid Formation
作者:Frits van der Klis、Jacco van Haveren、Daan S. van Es、Johannes H. Bitter
DOI:10.1002/cssc.201700051
日期:2017.4.10
5-dicarboxylic acid (FDCA). Here, a new strategy for obtaining furans is presented, bypassing the formation of the unstable HMF. Instead of starting with glucose/fructose and thus forming HMF as an intermediate, the new route starts from uronic acids, which are abundantly present in many agro residues such as sugar beet pulp, potato pulp, and citrus peels. Conversion of uronic acids, via ketoaldonic acids, to
5-羟甲基糠醛(HMF)是生物质转化途径中的通用中间体。然而,众所周知,HMF的不稳定性质给设计选择性路线提供了挑战,这些路线设计了诸如呋喃-2,5-二羧酸(FDCA)之类的化学物质。在这里,提出了一种获得呋喃的新策略,绕过了不稳定的HMF的形成。新途径不是从葡萄糖/果糖开始,从而形成HMF作为中间体,而是从糖醛酸开始,糖醛酸广泛存在于许多农业残留物中,如甜菜浆,马铃薯浆和柑桔皮。经由酮醛酸将糖醛酸转化为中间体甲酰基糠酸(FFA)酯,然后转化为FDCA酯,而不会形成乙酰丙酸或不溶性腐殖质。