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ChemicalBook CAS DataBase List Diacerein
13739-02-1

Diacerein synthesis

10synthesis methods
-

Yield:13739-02-1 95%

Reaction Conditions:

with dmap;triethylamine in acetic anhydride at 20; for 1 h;

Steps:

1.a

a. Dissolve rhein (10g, 0.035mmol) in acetic anhydride solution and slowly add DMAP (2.15g, 0.018mmol) under stirring at room temperature. Solid appears in the reaction solution, and then slowly add triethylamine 9.7 mL, 0.07 mmol),The solid was dissolved and after rapid stirring at room temperature for 1 h, 1 M HCl was added dropwise. Another solid appeared in the solution and the reaction was quenched with water.The reaction solution was suction filtered, washed to obtain a crude product, the crude product was recrystallized to give a yellow powder compound B, a yield of 95%;

References:

CN107298648,2017,A Location in patent:Paragraph 0041

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