Hydrochloric Acid → 1,3-dihydro-4-(4-methoxybenzoyl)-5-[(4-phenyl-1-piperidinyl)methyl]-2H-imidazol-2-one hydrochloride

Participants

Reaction Conditions

Reaction Steps

A mixture of 4.7 g (15 mmole) of 5-(bromomethyl)-1,3-dihydro-4-(4-methoxybenzoyl)-2H-imidazol-2-one, 2.5 g (16 mmole) of 4-phenylpiperidine, 2.1 g (15 mmole) of potassium carbonate and 75 ml of ethanol is stirred at 25° C. for 16 hours. Water (100 ml) is added and a precipitate forms. This is separated by filtration and washed with water. It is then suspended in 2-propanol and 1 equivalent of hydrogen chloride in 2-propanol is added. The resulting solid is separated by filtration and recrystallized from 2-propanol containing a little water to give 1,3-dihydro-4-(4-methoxybenzoyl)-5-[(4-phenyl-1-piperidinyl)methyl]-2H-imidazol-2-one hydrochloride melting at about 230° C. with decomposition.

Provenance & Evidence