1220-95-7Relevant articles and documents
Synthesis of quinizarin and its derivatives under conditions of microwave activation
El'tsov,Sokolova,Grigor'ev,Dmitrieva,Shtol'vin
, p. 255 - 258 (2007/10/03)
In a microwave field, phthalic anhydride reacts with p-chlorophenol to give 1,4-dihydroxyanthraquinone (quinizarin) within 10 min. The reaction with 4-chlorophthalic anhydride occurs similarly. Phthalic and chlorophthalic acids can be used instead of anhydrides. 3-Nitrophthalic acid and 3,4,5,6-tetrabromophthalic anhydride do not react with p-chlorophenol under these conditions.