Multi-step reaction with 14 steps
1: 94 percent / PCC, neutral activity I Al2O3 / CH2Cl2 / 18 h / 0 °C
2: 1.) n-BuLi / 1.) THF, hexane, 0 deg C, 40 min, 2.) THF, hexane, 0 deg C, 3.5 h
3: 82 percent / LiBH4 / tetrahydrofuran / 17 h / 0 - 20 °C
4: NaH / toluene / 2 h / Ambient temperature
5: 77 percent / NaH / dimethylformamide / 16 h / Ambient temperature
6: conc. aq. HCl / acetic acid / 24 h / Heating
7: SOCl2 / 30 h / Ambient temperature
8: CH2Cl2 / 18 h / Ambient temperature
9: 49 percent / LiBH4 / tetrahydrofuran / 18.5 h / 0 - 20 °C
10: 92 percent / H2 / 10percent Pd/C / ethanol / 10 h / Ambient temperature
11: 93 percent / acetic anhydride / tetrahydrofuran / 4 h / 20 - 70 °C
12: 99 percent / BH3 / tetrahydrofuran / 2.5 h / 0 °C
13: 86 percent / 2,6-lutidine / 1,2-dichloro-ethane / 24 h / Heating
14: H2 / 10percent Pd/C / ethanol / 2 h / 760 Torr / Ambient temperature
With
2,6-dimethylpyridine; hydrogenchloride; aluminum oxide; lithium borohydride; n-butyllithium; thionyl chloride; borane; hydrogen; acetic anhydride; sodium hydride; pyridinium chlorochromate;
palladium on activated charcoal;
In
tetrahydrofuran; ethanol; dichloromethane; acetic acid; 1,2-dichloro-ethane; N,N-dimethyl-formamide; toluene;
DOI:10.1021/jm970704s