Ammonia → Vilazodone

Participants

Reaction Conditions

Reaction Steps

Methyl 5-[4-[4-(5-cyanoindol-3-yl)butyl]piperazin-1-yl]benzofuran-2-carboxylate (41 g) was added to saturated methanolic ammonia solution (8200 ml) under stirring at 25-30° C., the resulting mixture was stirred for 3 to 4 hours at the same temperature to form a clear solution. The reaction mass was stirred for 24 hours at 25-30° C., followed by filtration of the separated solid and then dried to produce 28 g of vilazodone. The mother liquors were taken and the solvent was distilled off under vacuum until the solvent quantity reaches around 1200 ml of the initial volume. The resulting mass was cooled to 25-30° C., followed by filtration and then drying to produce 11 g of Vilazodone (Purity by HPLC: 99.5%; Yield: 98.5%).

Provenance & Evidence