You are here: Home :: Area NEM :: Agricultural science

T. P. Schultz, T. H. Fisher

Alkaline Hydrolysis of Nonphenolic ?-0-4 Lignin Models: Substituent Effect of the A-Ring on the Rate

Six nonphenolic ?-0-4 lignin models substituted on the phenyl A-ring [unsubstituted; 3,5-dimethoxyl; 3,4-dimethoxyl; 3-methoxyl; 4-methoxyl; and 4-methyl] were synthesized and the alkaline hydrolysis rates at 170°C determined. Electron-withdrawing substituents enhanced the hydrolysis rate, but this effect was relatively minor. Over 90% of the disappearance of the dimer could be accounted for by appearance of the B-ring phenolic product for all compounds, which suggests that minimal side reactions occurred.

Holzforschung, Walter de Gruyter

Print ISSN: 0018-3830
Volume: 56, 11/2002
Pages: 592 - 594

Show full article (external site)

Show all available items of this journal

 

Area NEM