Hydrochloric Acid → HCID 57482543, compound

Participants

Reaction Steps

Trifluoroacetic acid (6 ml) was added to a solution of 1.22 g (3.7 mmol) of tert-butyl 4-benzo[b]thiophen-4-yl-3-methylpiperazin-1-carboxylate in a dichloromethane solution (12 ml) and the mixture was stirred at room temperature for one hour. The reaction mixture was concentrated under reduced pressure, and a 5% aqueous potassium carbonate solution was added to the residue and the resulting mixture was extracted with dichloromethane. The extraction solution with dichloromethane was dried over magnesium sulfate and thereafter concentrated under reduced pressure. To the residue obtained, concentrated hydrochloric acid (0.6 ml) and methanol (10 ml) were added and the resulting mixture was concentrated under reduced pressure. The obtained residue was subjected to recrystallization from acetonitrile to obtain 1-benzo[b]thiophen-4-yl-2-methylpiperazine dihydrochloride (0.98 g) as light brown powder.

Provenance & Evidence