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Simple method for synthesizing phenolicβ-O-4 dilignols
Journal of Wood Science volume 45, pages 440–443 (1999)
Abstract
A modified synthetic method for phenolicβ-O-4 lignin substructure model dimers was developed involving protection of the phenolic hydroxyl group of acetophenons with benzoyl chloride, bromination with 4-dimethylaminopyridiniumbromide perbromide, condensation with phenols in the presence of 18-crown-6-ether, condensation with paraformaldehyde, reduction with NaBH4 and debenzoylation. This method results in shorter reaction times and increasing yields without the application of strict anhydrous and drastic conditions or chloric solvents. This alternative route could be applied to theβ-O-4 dilignol syntheses of four combinations of guaiacyl and syringyl derivatives.
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Kawai, S., Okita, K., Sugishita, K. et al. Simple method for synthesizing phenolicβ-O-4 dilignols. J Wood Sci 45, 440–443 (1999). https://doi.org/10.1007/BF01177919
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DOI: https://doi.org/10.1007/BF01177919