Efatutazone Dihydrochloride → Hydrochloric Acid

Participants

Reaction Conditions

Reaction Steps

2.0 g of the monohydrate of 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H-benzimidazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione dihydrochloride obtained by a method similar to the method described in Example 1-1 was suspended in 100 ml of water. The resulting suspension was refluxed for 2 hours. The reaction mixture was cooled to 0° C. and agitated for 1 hour. The obtained crystalline form was filtered off and rinsed with water. The obtained moist crystalline form was dried for 14 hours at a pressure of approximately 80 kPa and at 50° C. to give a crystalline form, wherein the proportion Of 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H-benzimidazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione and hydrochloric acid was approximately 1 to 1.1.

Provenance & Evidence