Manipulation of lignin condensation pathways to produce different bisphenols from biomass

-condensation reactions among lignin fragments and, meanwhile, enable the production of novel lignin-derived bisphenols (1,3-diaryl propanes) with a molar yield of 35.2% (mass yield of 45.9 wt %) from eucalyptus feedstock. The mechanistic finding represents a significant advance in lignin chemistry and enables the manipulation of lignin condensation pathways in a wider temperature range for the production of valuable bisphenols (1,1-diaryl propane, 1,2-diaryl propane, and 1,3-diaryl propane), which can serve as precursors for synthesizing biobased polymers and sustainable aviation fuels.