Trifluoroacetic acid → HCID 14881723, compound

Participants

Reaction Steps

1-[2-(1-tert-Butoxycarbonyl-3-piperidinyl)thiazolidin-4-ylcarbonyl]-4-(3-phenylpropyl)piperazine (430 mg) was dissolved in 3 ml of dichloromethane, followed by addition of 2 ml of trifluoroacetic acid. The mixture was stirred at room temperature for 6 hours. The reaction mixture was poured into 60 ml of saturated aqueous solution of sodium hydrogen carbonate, and the product was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate and concentrated under reduced pressure to give 280 mg of 1-(3-phenylpropyl)-4-[2-(3-piperidinyl)thiazolidin-4-ylcarbonyl]piperazine. This compound was dissolved in 8 ml of ethyl acetate, and 1 ml of 4N hydrogen chloride solution in dioxane was added. After 30 minutes of stirring, the resultant solid was collected by filtration and dried to give 200 mg of 1-(3-phenylpropyl)-4-[2-(3-piperidinyl)thiazolidin-4-ylcarbonyl]piperazine trihydrochloride. Melting point 174°-178° C.

Provenance & Evidence