Hydrochloric Acid → 1-[[[4-(1H-Imidazol-1-yl)phenyl]methyl]amino]-3-(2-methylphenoxy)-2-propanol dihydrochloride

Beteiligte Stoffe

Reaktionsschritte

Dissolve 1.74 g (10.04 mmol) of 4-(1H-imidazol-1-yl)-benzenemethanamine in 20 mL of dry DMSO under nitrogen. Add 2.44 mL (11.55 mmol) of hexamethyldisilazane and stir at room temperature for 30 min. After this time, add a solution of 1.73 g (10.54 mmol) of 1,2-epoxy-3-(2-methylphenoxy)propane in 10 mL of DMSO and heat in an oil bath at 60° C. for 42 h. Follow the progress of the reaction by thin-layer chromatography on silica gel (acetonitrile: ammonia (aq), 90:10). At the completion of the reaction, add 6 N hydrochloric acid to pH=1 and then add 4 N sodium hydroxide to pH=12. Dilute this basic mixturewith 20 mL of water and extract with 3×75 mL of methylene chloride. Remove the solvent on the rotary evaporator. Purify this residue by flash chromatography using flash silica gel (Baker) and eluting with a solution of acetonitrile: ammonia hydroxide 98:2. Combine pure fractions and removethe solvent on the rotary evaporator. Dissolve this residue in 50 mL of acetonitrile and remove the solvent on the rotary evaporator. Dissolve this residue in 10 mL of methanol and bubble hydrogen chloride through thesolution until pH=1 is reached. Remove the solvent on the rotary evaporatorand recrystallize the solid from 20 mL of isopropanol to provide the title compound.

Herkunft & Nachweise