Multi-step reaction with 11 steps
1: 31 percent / NaOAc, glacial AcOH / toluene / 24 h
2: LiAlH4 / tetrahydrofuran / 1 h / 0 °C
3: Et3N / CH2Cl2 / 1 h / -78 - 20 °C
4: dimethylformamide; dimethylsulfoxide / 1 h / 125 °C
5: 2.) p-toluenesulfonic acid / 1.) 1,2-dichlorobenzene, reflux, 16 h, 2.) 1,2-dichlorobenzene, 150 deg C, 45 min
6: 79 percent / pyridine / CH2Cl2 / 0.5 h / 0 °C
7: 88 percent / Et3N, (diphenylphosphino)ethane, Pd(OAc)2 / dimethylsulfoxide; methanol / 48 h / 70 - 80 °C
8: 99 percent / LiBH4 / tetrahydrofuran / 16 h / Ambient temperature
9: 83 percent / MnO2 / CH2Cl2 / 16 h / 40 °C
10: 94 percent / tetrahydrofuran / 1.25 h / -70 - 25 °C
11: 63 percent / H2 / 10percent Pd/C / methanol; ethyl acetate / 16 h / 760 Torr
With
pyridine; manganese(IV) oxide; palladium diacetate; lithium aluminium tetrahydride; lithium borohydride; hydrogen; sodium acetate; toluene-4-sulfonic acid; acetic acid; triethylamine; ethyl-diphenyl-phosphane;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; dichloromethane; dimethyl sulfoxide; ethyl acetate; N,N-dimethyl-formamide; toluene;
DOI:10.1021/jm00071a008