The Alkaline Reactions of Some Simple Quinonemethide-Anthrahydroquinone Adducts
- 1 January 1982
- journal article
- research article
- Published by Taylor & Francis in Journal of Wood Chemistry and Technology
- Vol. 2 (1) , 73-95
- https://doi.org/10.1080/02773818208085121
Abstract
The rapid delignification rates associated with anthraquinone-alkaline pulping could be due to the formation and reactions of lignin qulnonemethide-anthrahydroquinone (QM-AHQ) adducts. The chemistry of some simple QM-AHQ adducts is examined here. Upon heating in aqueous alkali, the QM-AHQ adducts fragment to QMs and AHQ. At 100° the adducts are reduced by AHQ dianion to afford QM-anthrone adducts and anthraquinone. At typical pulping temperatures (173°), the adducts are extensively, but not completely, decomposed, releasing AHQ and/or anthraquinone.Keywords
This publication has 7 references indexed in Scilit:
- Regioselective alkylation of anthrahydroquinone and anthrone in water with quinonemethides and other alkylating agentsThe Journal of Organic Chemistry, 1982
- Mass Spectra of Quinonemethide Products Derived from Reaction with Phenolics, Anthrone and AnthrahydroquinoneJournal of Wood Chemistry and Technology, 1981
- The Influence of Anthrahydroquinone and Other Additives on the Condensation Reactions of Vanillyl AlcoholJournal of Wood Chemistry and Technology, 1981
- Formation of aryl benzanthrones from anthraquinone-catalysed degradation of ligninTetrahedron Letters, 1979
- Short NoteHolzforschung, 1979
- Isolation of 3-guaiacylbenzanthrone from anthraquinone pulping liquorsJournal of the Chemical Society, Chemical Communications, 1979
- Substitution Reactions Which Proceed via Radical Anion IntermediatesAngewandte Chemie International Edition in English, 1975