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ChemicalBook CAS DataBase List 2,4-DINITROCHLOROBENZENE-6-SULFONIC ACID
4515-26-8

2,4-DINITROCHLOROBENZENE-6-SULFONIC ACID synthesis

3synthesis methods
4-Chloronitrobenzene is sulfonated by gradual addition of 25 % oleum at 60 ℃; the temperature is raised slowly to 125 ℃, and held there for 8 h. The sulfonation mixture is cooled to 70 ℃, nitric acid is added over 5 h, and the reaction is completed by heating for 12 h at 70 ℃ followed by 4 h at 100 ℃. After cooling and quenching, the sodium salt of the product is salted out by addition of sodium sulfate and isolated in 80 % yield.
-

Yield:-

Reaction Conditions:

with sulfuric acid at 110;Nitrieren der erhaltenen Loesung von 6-Chlor-3-nitro-benzol-sulfonsaeure-(1) mit Salpetersaeure;

References:

Karpuchin [Chemisches Zentralblatt,1929,vol. 100,# I,p. 3091]

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