1,2-Dichloroethane → HCID 57597100, compound

Participants

Reaction Steps

An oven-dried, round-bottom flask was charged with tert-butyl piperazine-1-carboxylate (1.1 eq), 3-nitrophenylacetic acid (7A, 1.0 eq), EDC (1.2 eq), and HOBT (1.2 eq). The flask was flushed with nitrogen, and A, N-dimethylfomamide (about 0.5 M 7A in DMF) and triethylamine (2.0 eq) were added by syringe. The resulting reaction mixture was stirred overnight at room temperature. The reaction mixture was then diluted with EtOAc, and washed 4 times with H2O, twice with 1 N aq. KHSO4, once with saturated NaHCO3, and once with brine. The organic layer was dried over Na2 SO4, filtered and concentrated in vacuo. Tert-butyl 4-(2-(3-nitrophenyl)acetyl)piperazine-1-carboxylate (7B) was isolated as a solid (80%) and used without further purification.

Provenance & Evidence