Multi-step reaction with 8 steps
1: 1.) AcOH, FeCl3, 2.) AcOH / 1.) 60 deg C, 5 min, 2.) reflux, 5 h
2: 63 percent / HNO3 / 1.) -50-(-40) deg C, 1 h, 2.) -30 deg C, 25 min
3: 73 percent / TFA, t-BuI, I2, FeCl2 / dimethylsulfoxide / 5 h / 80 - 85 °C
4: 93 percent / HCl / diethyl ether / 65 h / Heating
5: 86 percent / NiCl2, BaBH4 / methanol / 0.08 h / 50 °C
6: 64 percent / aq. HCl / tetrahydrofuran / 1 h / 40 °C
7: CH2Cl2 / 15 h / Ambient temperature
8: 1.) NaH / 1.) THF, room temperature - 45 min, reflux - 15 min, 2.) THF, room temperature, 14 h
With
hydrogenchloride; iodine; nitric acid; iron(III) chloride; sodium hydride; tert-Butyl iodide; acetic acid; trifluoroacetic acid; nickel dichloride; iron(II) chloride;
In
tetrahydrofuran; methanol; diethyl ether; dichloromethane; dimethyl sulfoxide;
DOI:10.1021/jo961743z