Exploring Alkyl-O-Alkyl Ether Structures in Softwood Milled Wood Lignins.

ABSTRACT: Recent studies have suggested that there are significant amounts of various alkyl ether (Alk-O-Alk; Alk = alkyl) moieties in a spruce native lignin preparation, milled wood lignin (SMWL). However, the comprehensive NMR assignment to these moieties has not been addressed yet. This study focused on investigating different types of Alk-O-Alk structures at the α- and γ-positions of the lignin side chain in an heteronuclear single-quantum coherence (HSQC) spectrum of SMWL using experimental NMR data of lignin and synthesized model compounds. Ambiguous structural features were predicted by computer simulation of ¹H and ¹³C NMR spectra to complement the experimental NMR data. As a result, specific regions in the HSQC spectrum were attributed to different Alk-O-Alk moieties o

SUBMITTER: Zhu X 

PROVIDER: S-EPMC9837880 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature