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7618239 
Journal Article 
STUDIES ON THE FORMATION OF BENZANTHRONES IN ALKALINE ANTHRAQUINONE PULPING 
Karhunen, P; Brunow, G; , 
1991 
Yes 
Acta Chemica Scandinavica
ISSN: 0904-213X
EISSN: 1902-3103 
MUNKSGAARD INT PUBL LTD 
COPENHAGEN 
45 
945-948 
English 
WOS:A1991GM29700010 
Loss of anthraquinone (AQ) in alkaline pulping is partly attributed to irreversible reactions of AQ or AQ-derived compounds with lignin fragments. 3-(4-Hydroxy-3-methoxyphenyl)benz[d,e]anthracen-7-one, 3-(4-hydroxy-3,5-dimethoxyphenyl)benz[d,e]anthracen-7-one and 3-(4-hydroxyphenyl)benz[d,e]anthracen-7-one have been synthesized and their formation in reactions of isolated lignins has been studied. 2-(4-Hydroxy-3-methoxyphenyl)anthracene-9,10-dione (2-vanillylanthraquinone) has also been prepared.