Acetic Acid → Temozolomide

Participants

Reaction Conditions

Reaction Steps

A 250 ml reaction vessel equipped with a magnetic stirrer and a reflux condenser was charged with Temozolomide hydrochloride (2.9 grams, 0.0126 mol), THF (23 ml), acetic acid (0.7 ml) and water (28.8 ml). The reaction mixture was heated to reflux and stirring was maintained at this temperature for about 10 minutes. The reaction mixture was filtered at elevated temperature and then cooled to 5° C. for about half an hour to enable crystallization. The crystals thus obtained were collected and washed with water (2×20 ml) and cold acetone (20 ml). The crystals were dried at 40° C. in vacuum to obtain 1.71 grams (0.0088 mol) of free Temozolomide base (70% yield). Purity (by HPLC): 99.8%.

Provenance & Evidence