Multi-step reaction with 11 steps
1: 92 percent / AD-mix-β, CH3SO2NH2 / 2-methyl-propan-2-ol; H2O / 4 deg C, 11 h then rt., 4 h
2: 73 percent / pyridine / 18 h / 4 °C
3: 87 percent / LiCl / dimethylformamide / 14 h / 85 °C
4: 91 percent / HCO2NH4 / 5percent Pd-C / methanol / 2 h / 0 °C
5: 99.6 percent / imidazole / dimethylformamide / 14 h / Ambient temperature
6: 95 percent / 1.5M DIBAL / CH2Cl2; toluene / 0.25 h / -78 °C
7: 74 percent / 1M NaBH3CN / methanol; acetic acid; tetrahydrofuran / 10 h / 0 - 10 °C
8: 99.6 percent / Et3N / dioxane / 14 h / 50 °C
9: 245 mg / 2M LiBH4 / tetrahydrofuran; diethyl ether / 15 h / Ambient temperature
10: 99 percent / DMAP, pyridine / 20 h / Ambient temperature
11: 134 mg / Ac2O, TBAF / tetrahydrofuran / rt., 3 h then 50 deg C, 4 h then 75 deg C, 11 h
With
pyridine; 1H-imidazole; dmap; lithium borohydride; methanesulfonamide; AD-mix-β; tetrabutyl ammonium fluoride; ammonium formate; acetic anhydride; diisobutylaluminium hydride; sodium cyanoborohydride; triethylamine; lithium chloride;
palladium on activated charcoal;
In
tetrahydrofuran; 1,4-dioxane; methanol; diethyl ether; dichloromethane; water; acetic acid; N,N-dimethyl-formamide; toluene; tert-butyl alcohol;
DOI:10.1016/S0040-4020(01)85520-4