INSOLUBLE LIGNIN MODELS .5. PREPARATION AND ALKALINE CONDENSATION-REACTIONS OF A POLYMER-BOUND QUINONE METHIDE

Authors
BARKHAU RA MALCOLM EW DIMMEL DR
Citation
Ra. Barkhau et al., INSOLUBLE LIGNIN MODELS .5. PREPARATION AND ALKALINE CONDENSATION-REACTIONS OF A POLYMER-BOUND QUINONE METHIDE, Journal of wood chemistry and technology, 14(1), 1994, pp. 17-44
Citations number
26
Categorie Soggetti
Materials Science, Paper & Wood
Journal title
Journal of wood chemistry and technology → ACNP
ISSN journal
02773813
Volume
14
Issue
1
Year of publication
1994
Pages
17 - 44
Database
ISI
SICI code
0277-3813(1994)14:1<17:ILM.PA>2.0.ZU;2-V
Abstract
A lignin model, capable of forming a quinone methide in alkali, was bo und to polystyrene and heated in alkali with 2,6-dimethoxyphenol. The polymer-supported phenol did not react with the soluble phenol under a variety of conditions, while an analogous non-bound phenol rapidly re acted with 2,6-dimethoxyphenolate ion, giving a condensation dimer in good yield. Condensation in the two-phased system appeared to be inhib ited primarily by steric factors involving the supporting polystyrene resin.