Английская Википедия:1,5-Dihydroxynaphthalene

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Шаблон:Chembox

1,5-Dihydroxynaphthalene is an organic compound with the formula CШаблон:SubHШаблон:Sub(OH)Шаблон:Sub. It is one of several isomers of dihydroxynaphthalene. A white solid, degraded samples often appear grey to light brown solid [1] that are soluble in polar organic solvents. It is a precursor to certain dyes.

Preparation and use

1,5-Dihydroxynaphthalene is prepared from naphthalene-1,5-disulfonic acid by hydrolysis with strong base followed by acidification.

It couples with various aryl diazonium salts to give diazo dyes. Oxidation with chromium trioxide gives juglone, a naturally occurring dye.[2]

In supramolecular chemistry, 1,5-dihydroxynaphthalene is a popular reagent.[3][4]

References

Шаблон:Reflist