A solid acid-catalyzed depolymerization of pine lignin to obtain guaiacol using a hydrogen-free strategy

A Strategy to Obtain Lignin-Based Alkyl-Free Phenols under Mild Conditions: Condensation Inhibition and Car–Cα Bond Cleavage

“…35,36 Our group found that C ar −C α bond cleavage can be effectively promoted by changing the binding environment around the C α site. 37 Takashi et al 38 found that various acyl aromatics could be selectively deacetylated to aromatics with catalytic amounts of trifluoromethanesulfonic acid (TFMSA) under heated reflux in 1,2-dichloroethane (DCE) containing a small amount of water. However, the difficulty of recycling and environmental pollution constrain the utilization of homogeneous catalysts.…”

“…It has been demonstrated that the electronic structure of Ni-based catalysts can be modulated by doping with a second reactive metal or carbon modification to regulate reactivity. , Wang et al showed that the carbon-modified Ni/MgAlO-C catalyst exhibits high selectivity in C–O bond hydrogenolysis of oxidized lignin and aromatic compounds containing ketone groups. Depolymerization of lignin by this strategy usually yields phenolic monomers containing acyl groups. , Our group found that C ar –C α bond cleavage can be effectively promoted by changing the binding environment around the C α site . Takashi et al found that various acyl aromatics could be selectively deacetylated to aromatics with catalytic amounts of trifluoromethanesulfonic acid (TFMSA) under heated reflux in 1,2-dichloroethane (DCE) containing a small amount of water.…”