反应详情

温度

80 °C

Iron powder (5.4 g, 97 mmol, 4 equiv) is added portionwise to an 80° C. mixture of 1-benzyl-4-(4-nitro-phenyl)-piperazine (7.2 g, 24.2 mmol), EtOH (150 mL), H2O (40 mL), and AcOH (20 mL). The reaction mixture is stirred for 1.75 h at 80° C., allowed to cool to RT, and concentrated. The residue is diluted with EtOAc and an aqueous saturated solution of Na2CO3. The layers are separated and the aqueous phase is extracted with EtOAc. The combined organic phase is washed with brine, dried (Na2SO4), filtered and concentrated to afford the title compound: ES-MS: 268.3 [MH]+; single peak at tR=1.30 min (system 1).

1. temperatureto cool to RT
2. concentrationconcentrated
3. additionThe residue is diluted with EtOAc
4. customThe layers are separated
5. extractionthe aqueous phase is extracted with EtOAc
6. washThe combined organic phase is washed with brine
7. dry with materialdried (Na2SO4)
8. filtrationfiltered
9. concentrationconcentrated