- 1H and 13C NMR studies of some anthraquinones and anthracenetetrones
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1H and 13C NMR chemical shifts are reported and assigned for 1,4,9,10- and 2,3,9,10-anthracenetetrone. In addition, NMR data are given for 2,3-dihydroxy-9, 10-anthraquinone, 2,3-dimethoxy-9,10-anthraquinone and 1-hydroxy-2-acetoxy-9,10-anthraquinone, encountered during the preparation of the anthracenetetrones.
- Danielsen,Francis,Aksnes
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p. 1043 - 1045
(2007/10/03)
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- Chemistry of Quinones. Part 6. The Selective Hydrolysis of α-Acetoxyanthraquinones and Related Compounds by Trifluoroacetic Acid Containing Small Amounts of Water
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Acetoxy- or benzoyloxy-substituents adjacent to the carbonyl groups of anthraquinone, 1,4-naphthoquinone, naphthacene-5,12-quinone, benzophenone, and methyl benzoate are selectively converted into hydroxy-groups by treatment with trifluoroacetic acid containing small amounts of water.In the absence of water a reversible acidolysis occurs.Water reacts with the acylating agent, thus preventing the reverse reaction.Evidence is presented that the hydrolyses are of the AAC1 type.
- Harrison, Charles R.,Hodge, Philip,Khan, Naeem
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p. 1592 - 1594
(2007/10/02)
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