Samiksha Jaiswal (Editor)

5,8 Dihydroxy 1,4 naphthoquinone

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Covid-19
Formula  C10H6O4
Molar mass  190.15 g/mol
5,8-Dihydroxy-1,4-naphthoquinone httpsuploadwikimediaorgwikipediacommonsthu

Naphthazarin, often called 5,8-dihydroxy-1,4-naphthoquinone or 5,8-dihydroxy-1,4-naphthalenedione (IUPAC), is a naturally occurring organic compound with formula C
10
H
6
O
4
, formally derived from 1,4-naphthoquinone through replacement of two hydrogen atoms by hydroxyl (OH) groups. It is thus one of many dihydroxynaphthoquinone structural isomers.

Naphthazarin is soluble in 1,4-dioxane from which it crystallizes as deep red needles that melt at 228−232 °C.

Synthesis

Naphtharazin can be prepared by condensation of 1,4-dimethoxybenzene with 2,3-dichloromaleic anhydride followed by reductive dechlorination and reoxidation.

Naphtharazin can also be obtained by oxidation of 5,8-dihydroxy-1-tetralone with manganese dioxide (MnO2).

References

5,8-Dihydroxy-1,4-naphthoquinone Wikipedia


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