Hydroxyanthraquinone

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Template:Short description

File:Quinizarin.svg
1,4-Dihydroxyanthraquinone, commonly called quinizarin is a common hydroxyanthroquinone.[1][2]

In organic chemistry hydroxyanthraquinones refers to compounds with the formula C12H8−n(OH)n(CO)2 where n ≥ 1. Almost all hydroxyanthraquinones are derivative of 9,10-anthraquinone.[3][4][5]

Isomers

One peculiarity of the hydroxyanthraquinones is the relative obscurity of the monohydroxy derivatives. Most hydroxyanthraquinones have two or more hydroxy groups.

Dihydroxy

Dihydroxyanthraquinones have the formula Template:Chem2. The dyes alizarin (1,2-Dihydroxyanthraquinone) and quinizarin are prominent examples.

Trihydroxy

Trihydroxyanthraquinones have the formula Template:Chem2. 1,2,4-Trihydroxyanthraquinone, commonly called purpurin, is a naturally occurring red/yellow dye.

Tetrahydroxy

Tetrahydroxyanthraquinones have the formula Template:Chem2. The dye quinalizarin (1,2,5,8-tetrahydroxyanthraquinone is one example.

Hexahydroxy

Dihydroxyanthraquinones have the formula Template:Chem2.1,2,3,5,6,7-hexahydroxy-9,10-anthraquinone (rufigallol) occurs in nature.

See also

References

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