Acetone → Ibandronate Sodium Anhydrous

Participants

Reaction Steps

A slurry of amorphous ibandronic acid (5 g) in acetonitrile (200 ml) was stirred at reflux temperature. Solid sodium hydroxide (0.63 g) was added, and the reaction mixture was stirred at reflux temperature for an additional 2 hours. Acetone (50 ml) was added dropwise. Then the reaction mixture was cooled to room temperature and stirred for 16 hours. The precipitate was isolated by vacuum filtration, washed with acetone (50 ml), and dried in a vacuum oven at 50° C. for 22 hours to obtain 3.5 g of amorphous ibandronate sodium.

Provenance & Evidence