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1.8- Dihydroxy-6-methoxy-3- anthraquinone

XIX Anthragallol-2-methyI ether — 1,3-Dihydroxy-2-methoxy-anthraquinone... [Pg.192]

XX Anthragallol-3-methyl ether — 1,2-Dihydroxy-3-methoxy-anthraquinone... [Pg.192]

Treatment of 1,2-. 1,4-, 1,5-, and 1,8-dimethoxyanthra-quinone with BF, etherate in Cf,H (reflux) result.s in difluoroboron chelates, which are hydrolyzed to the corresponding l-hydroxy-2-methoxy-, -4-methoxy-, -5-methoxy-, and -8-methoxyanthraquinones when heated in CH,OH. This selective dealkylation can be used to convert 1,4,5-trimethoxyanthraquinone (1) into either 4-hydroxy-1,5-dimethoxy-anthraquinone (4) or l,4-dihydroxy-5-methoxyanthraquinone (5). [Pg.66]

See other pages where 1.8- Dihydroxy-6-methoxy-3- anthraquinone is mentioned: [Pg.141]    [Pg.550]    [Pg.762]    [Pg.762]    [Pg.206]    [Pg.443]    [Pg.550]    [Pg.26]    [Pg.33]    [Pg.171]    [Pg.13]    [Pg.762]    [Pg.141]   
See also in sourсe #XX -- [ Pg.171 ]



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Anthraquinone 1-methoxy

Anthraquinones

Dihydroxy anthraquinone

Dihydroxy anthraquinones

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