Investigate cleavage of β-O-4 linkage in lignin model compounds by aerobic oxidation of Cα and Cγ hydroxyl groups
作者:Nikhil D. Patil、Ning Yan
DOI:10.1016/j.tetlet.2016.05.105
日期:2016.7
The selective cleavage of common linkages in lignin polymers is a promising approach to generate valuable aromatic hydrocarbons. Herein, we found that on oxidation of Cα and Cγ hydroxyl groups in β-O-4 lignin model compounds with TEMPO catalyst resulted in the formation of 1,3-dicarbonyl TEMPO adduct. These oxidized products readily underwent fragmentation at Cα–Cβ bond in the presence of a catalytic
木质素聚合物中常见键的选择性裂解是产生有价值的芳烃的有前途的方法。在此,我们发现用TEMPO催化剂氧化β-O-4木质素模型化合物中的Cα和Cγ羟基会导致1,3-二羰基TEMPO加合物的形成。这些氧化产物在催化量的酸存在下很容易在Cα–Cβ键处发生断裂,从而生成相应的羧酸和酚单体。