Potassium tert-butoxide → HCID 15117095, compound

Participants

Reaction Steps

To a stirred solution, under nitrogen, 17.0 g of 1-[(phenylhydrazono)(2,4-difluorophenyl)methyl]-4-methylpiperazine in 200 ml of tetrahydrofuran was added dropwise a solution of 7.1 g of potassium t-butoxide in 75 ml of tetrahydrofuran. The reaction mixture was stirred at ambient temperature for 2 hours, then concentrated, diluted with water and extracted with ethyl acetate. The extract was washed with water, dried over anhydrous magnesium sulfate and concentrated to yield 6-fluoro-1-phenyl-3-(4-methyl-1-piperazinyl)-1H-indazole as an oil. The oil was dissolved in ethanol-diethyl ether and treated with ethereal hydrogen chloride to precipitate the hydrochloride salt. Recrystallization from methanol yielded 9.0 g, (45%) of 6-fluoro-1-phenyl-3-(4-methyl-1-piperazinyl)-1H-indazole hydrochloride, m.p. 298°-300° (dec.).

Provenance & Evidence