Ammonia → Piperazine, 1-(7-benzofuranyl)-

Participants

Reaction Steps

Trifluoroacetic acid (5 ml) was added dropwise at 20° C. under nitrogen to a cooled solution of tert-butyl 4-(7-benzo[b]furanyl)piperazine-1-carboxylate (1.66 g) in dichloromethane (5 ml). The solution was stirred at ambient temperature for 1 hour, then poured into cold water (50 ml). The mixture was basified by the addition of aqueous ammonia solution, then the product was extracted into dichloromethane (2×50 ml). The combined organic extracts were washed with brine (100 ml), dried (MgSO4), and the solvent removed in vacuo to give 1-(7-benzo[b]furanyl)piperazine (1.02 g).

Provenance & Evidence