Zhao, Chengke; Hu, Zhenhua; Shi, Lanlan; Wang, Chen; Yue, Fengxia; Li, Suxiang; Zhang, Han; Lu, Fachuang published the artcile< Profiling of the formation of lignin-derived monomers and dimers from Eucalyptus alkali lignin>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Eucalyptus alkali lignin monomer dimer fraction chem pulping.
Lignin is a renewable and the most abundant aromatic source that can be used for extensive chems. and materials. Although approx. 50 million tons of lignin are produced annually as a byproduct of the pulp and paper industry, it is currently underutilized. It is important to know the structural features of tech. lignin when considering its application. In this work, we have demonstrated the formation of low-mol.-weight constituents from hardwood (Eucalyptus) lignin, which produces much more low-mol.-weight constituents than softwood (spruce) lignin, after a chem. pulping process, and analyzed the micromol. compositions in the alkali lignin after fractionation by dichloromethane (DCM) extraction By applying anal. methods (gel-permeation chromatog., 2D NMR and GC-MS) with the aid of evidence from authenticated compounds, a great treasure trove of lignin-derived phenolic compounds from Eucalyptus alkali lignin were disclosed. Except for some common monomeric products, as many as 15 new lignin-derived monomers and dimers including syringaglycerol, diarylmethane, 1,2-diarylethanes, 1,2-diarylethenes, (arylvinyl ether)-linked arylglycerol dimers and isomeric syringaresinols were identified in the DCM-soluble fraction. Regarding the formation and evolution of the Cα-condensed β-aryl ether structure, a novel route that is potentially responsible for the high content of β-1 diarylethenes and diarylethanes in the lignin low-mol.-weight fraction, in addition to the β-1 (spirodienone) pathway, was proposed. This work not only provides novel insights into the chem. transformation of S-G lignin during the alkali pulping process, but also discovered lignin-derived phenolic monomers and dimers that can potentially be used as raw materials in the chem. or pharmaceutical industries.
Green Chemistry published new progress about Bond energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
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