Multi-step reaction with 8 steps
1: N-bromosuccinimide (NBS), dibenzoyl peroxide / CCl4 / 20 h / Heating; Irradiation
2: Et3N / acetonitrile / 6 h / Heating
3: CF3CO2H / CH2Cl2 / 0 - 6 °C
4: 1.) NaNO2, conc. aq. HCl, AcOH, 2.) SO2, aq. CuCl2 / 1.) -5 deg C - deg C, 15 min, 2.) from 0 deg C to RT, 3 h
5: 81.9 percent / N,N-diisopropylethylamine / tetrahydrofuran / 3.5 h / 0 - 20 °C
6: 46 percent / hydrazine / ethanol / 3 h / 80 °C
7: 2.) aq. NH4Cl / 1.) toluene, 80 deg C, 18 h, 2.) toluene, RT, 30 min
8: 83 percent / HCl (gas) / ethyl acetate / 1.25 h / 0 - 20 °C
With
hydrogenchloride; N-Bromosuccinimide; sulfur dioxide; ammonium chloride; acetic acid; triethylamine; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid; copper dichloride; hydrazine; sodium nitrite; dibenzoyl peroxide;
In
tetrahydrofuran; tetrachloromethane; ethanol; dichloromethane; ethyl acetate; acetonitrile;
DOI:10.1021/jm00114a024