Copper‐Mediated Conversion of Complex Ethers to Esters: Enabling Biopolymer Depolymerisation under Mild Conditions
作者:Ganyuan Xiao、James R. D. Montgomery、Christopher S. Lancefield、Isabella Panovic、Nicholas J. Westwood
DOI:10.1002/chem.202000088
日期:2020.9.25
into a biorefinery set‐up. An approach is described in which this unit is modified to incorporate a carboxylic ester with the goal of enabling the use of mild depolymerisation conditions. Inspired by preliminary results using a Cu/TEMPO/O2 system, a protocol was developed that gave the desired β‐O‐4‐containing ester in high yield using certain dimeric model compounds. The optimised reaction conditions
木质素中β- O -4 单元的选择性加工对于这种生物聚合物的有效解聚至关重要,因此能够成功整合到生物精炼装置中。描述了一种方法,其中对该单元进行修改以掺入羧酸酯,目的是能够使用温和的解聚条件。受 Cu/TEMPO/O 2系统初步结果的启发,开发了一种方案,使用某些二聚模型化合物以高产率提供所需的含β- O -4 的酯。然后将优化的反应条件应用于低聚木质素模型系统。广泛的 2D NMR 分析表明,可以使用低聚底物实现类似的化学反应。含酯低聚物的温和解聚产生了预期的芳基酸单体。