Chemicals from lignin by diol-stabilized acidolysis: reaction pathways and kinetics was written by Zhang, Zhenlei;Lahive, Ciaran W.;Winkelman, Jozef G. M.;Barta, Katalin;Deuss, Peter J.. And the article was included in Green Chemistry in 2022.Related Products of 34946-82-2 This article mentions the following:
The product selectivity, production rates and the required process conditions are important for technol. development. Selective lignin depolymerization on the prime β-O-4 motif provides an opportunity to obtain valuable functionalized phenolic monomers. Diol-stabilized acidolysis of lignin with sulfuric acid, triflic acid or triflate salts is a proven β-O-4 cleavage methodol. that forms acetals by trapping of released reactive aldehydes. For future scale-up, a better understanding of the prime reaction pathways and how these can be controlled upon changing reaction parameters is required. By using β-O-4 model compounds and ytterbium(III) triflate as catalyst, starting material conversion and product formation including two key intermediates, the diol adducts (in this study, ethylene glycol as the diol) and the vinyl ethers, were accurately monitored, allowing for detailed kinetic modeling. Over the selected temperature range (80-150°C), higher temperatures led to higher overall carbon balance and selectivity for the main desired acetal product. The kinetic modeling allowed for establishing a detailed reaction network with activation energies and rate constants These collectively led to new insights into the key steps involved in the diol-stabilized β-O-4 motif acidolysis and how the reaction selectivity can be manipulated by controlling the reaction temperature, and the ethylene glycol and water content. Al. The elucidation on reaction kinetics and networks constitutes a further step in the design of a diol-stabilized lignin acidolysis process. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Related Products of 34946-82-2).
Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. Copper catalyst has received great attention owing to the low toxicity and low cost. These ligands enable the reaction promoted in mild condition. The reaction scope has also been greatly expanded, rendering this copper-based cross-coupling attractive for both academia and industry. Related Products of 34946-82-2
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”