Center for Renewable Carbon, Center for the Catalytic Conversion of Biomass (C3Bio), University of Tennessee, Knoxville, Tennessee 37917, USA.
Org Lett. 2013 Jun 7;15(11):2730-3. doi: 10.1021/ol401065r. Epub 2013 May 16.
Phenolic lignin model monomers and dimers representing the primary substructural units of lignin were successfully oxidized to benzoquinones in high yield with molecular oxygen using new Co-Schiff base catalysts bearing a bulky heterocyclic nitrogen base as a substituent. This is the first example of a catalytic system able to convert both S and G lignin model phenols in high yield, a process necessary for effective use of lignin as a chemical feedstock.
新型钴席夫碱催化剂含有大位阻杂环氮作为取代基，成功地将代表木质素主要亚结构单元的酚类木质素模型单体和二聚体在分子氧存在下氧化为苯醌，产率很高。这是首例能够高产率转化 S 和 G 木质素模型酚的催化体系，这是有效利用木质素作为化学原料的必要过程。
