p-Toluenesulfonic acid → HCID 178437857, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1-cyclopentyl-3-ethyl-5-amino-1H-pyrazole-4-carboxamide (2.03 g, 9.14 mmol), 4-[3-(dimethylamino)propoxy]benzaldehyde (2.76 ml), and xylenes was heated at 120° C. for 1 hour, then at 160° C. for 6 hours. p-Toluenesulfonic acid (300 mg) was added and the mixture was heated at 160° C. until the reaction was complete. The reaction mixture was cooled to room temperature, and a creamy white solid formed, which was collected by filtration, washed with methanol and recrystallized from ethyl acetate to afford 1-cyclopentyl-3-ethyl-6-[4-[3-(dimethylamino)propoxy]phenyl]pyrazolo[3,4-d]pyrimidin-4-one, as a white solid, m.p. 175°-178° C.

Provenance & Evidence