Multi-step reaction with 11 steps
1: 95 percent / p-TsOH / acetonitrile / 1 h
2: 93 percent / NaH / dimethylformamide / 2 h / -15 °C
3: 86 percent / NaCNBH3, HCl / diethyl ether; tetrahydrofuran
4: pyridine / CH2Cl2 / 0.5 h / Ambient temperature
5: acetonitrile / 1 h / 35 °C
6: 36 percent / 1 M DIBALH / toluene; CH2Cl2 / 1.) -70 deg C, 2 h, 2.) -70 deg C to r.t., 4 h
7: 64 percent / Et3N / 18 h / 60 °C
8: 56 percent / LDA / tetrahydrofuran; hexane / 1.) THF, hexane, -100 deg C, 30 min, 2.) HMPA, THF, 1 h
9: Raney nickel W II / tetrahydrofuran / 7 h
10: pyridine / Ambient temperature
11: 1 M NaOMe / methanol / 2 h / Ambient temperature
With
pyridine; hydrogenchloride; Raney nickel W II; sodium methylate; sodium hydride; diisobutylaluminium hydride; sodium cyanoborohydride; toluene-4-sulfonic acid; triethylamine; lithium diisopropyl amide;
In
tetrahydrofuran; methanol; diethyl ether; hexane; dichloromethane; N,N-dimethyl-formamide; toluene; acetonitrile;