Methanesulfonic Acid → Nelfinavir Mesylate

Participants

Reaction Steps

Nelfinavir base (25 g) is suspended in THF (75 ml), and methanesulfonic acid (4.25 g) is added at temperature of 26° C. to 40° C. over 30 min. The reaction mixture is maintained at 40° C. to 45° C. for 1 hr to get clear solution. The obtained clear solution is cooled to 28° C. to 32° C. and 2-pentanone (145 ml) is added over 30 min, mixed at temperature of 28° C. to 32° C. for 1 hrs. The reaction mass is cooled and maintained at 0° C. to 5° C. for 2 hr. The precipitated solid is filtered, washed with chilled 2-pentanone (12.5 ml) and dried at 90° C. to 100° C. under vacuum till becomes constant weight.

Provenance & Evidence