Methanesulfonic Acid → 10-bromo-2-(3-pyridylmethyl)-5-(3-pyridylmethyloxy)-3H-pyrido[3,2,1-kl]phenothiazin-3-one dimethanesulfonate

Participants

Reaction Steps

The compound (9.34 g) obtained in Example 39 was suspended in methanol (360 mL) and to the suspension was added methanesulfonic acid (2.35 mL). The solution was condensed under reduced pressure and the residue was crystallized with a small amount of methanol to obtain title compound (12 g; 95%).

Provenance & Evidence