Water → HCID 14032657, compound

Participants

Reaction Steps

To a stirred mixture of cyanogen bromide (21.67 g, 0.204 moles) and potassium carbonate (33.2 g, 0.24 moles) in dimethyl sulfoxide (400 ml) was added dropwise a solution of 1-(4-fluorophenyl)-3-(1-methyl-4-piperidinyl)-1H-indazole (59.45 g, 0.192 moles), the free base of example 67, in hot dimethyl sulfoxide (375 ml). The reaction was stirred at ambient temperature for 4 days and then poured into H2O (500 ml). The product was extracted (dichloromethane), dried (MgSO4), and concentrated to yield 64 g of a solid. The product was recrystallized twice from isopropyl alcohol yield 35.7 g (58%) of 4-[1-(4-fluorophenyl)-1H-indazol-3-yl]piperidine-1-carbonitrile, mp 108°-110° C.

Provenance & Evidence