Hydrochloric Acid → HCID 19887073, compound

Participants

Reaction Steps

To a stirred solution, under nitrogen of 12.4 g of 1-[(phenylhydrazono)(2-fluorophenyl)methyl]-4-methylpiperazine in 100 ml of a solution of tetrahydrofuran was added dropwise, 5.3 g of potassium t-butoxide in 50 ml of tetrahydrofuran. Following the addition, the reaction mixture was stirred at ambient temperature for 1 hour, poured into water, and extracted with dichloromethane. The extract was washed with water, dried over anhydrous magnesium sulfate and concentrated to an oil. The oil was purified on a Water's Model 500 Preparative High Pressure Liquid Chromatograph utilizing two silica gel columns and dichloromethane/methanol (4%) as the eluent. Concentration of the appropriate fractions gave 7.0 g (61%) of 1-phenyl-3-(4-methyl-1-piperazinyl)-1H indazole. Treatment of 3.1 g of the indazole with ethereal hydrogen chloride produced the hydrochloride salt. Recrystallization from ethanol gave 2.8 g of 1-phenyl-3-(4-methyl-1-piperazinyl)-1H-indazole hydrochloride, mp 244°-246°.

Provenance & Evidence