Multi-step reaction with 14 steps
1: 78 percent / dry HCl / 24 h / 25 °C
2: 87 percent / lithium aluminum hydride / tetrahydrofuran / 18 h / Heating
3: 80 percent / benzoic acid, triethyl orthoformate / 130 - 200 °C
4: 92 percent / triethylamine, 4-(dimethylamino)pyridine (DMAP) / CH2Cl2 / 2 h / 0 °C
6: 91 percent / sodium azide / dimethylformamide / 12 h / 50 °C
7: 77 percent / imidazole / dimethylformamide / 14 h / 25 °C
8: 97 percent / hydrogen / 10percent palladium on carbon / tetrahydrofuran / 5 h
9: 1.) triethylamine, diphenylphosphoryl azide / 1.) DMF, -20 deg C, 30 min, 2.) a) -20 deg C, 3 h, b) 25 deg C, 12 h
10: 95 percent / diisobutylaluminum hydride (DIBAL-H) / tetrahydrofuran; toluene / 4 h / Heating
11: 90 percent / triethylamine / CH2Cl2 / 3 h / 0 °C
12: 82 percent / tetra-n-butylammonium fluoride / tetrahydrofuran / 2.5 h / 0 °C
13: 91 percent / triethylamine / CH2Cl2 / 3 h / 0 °C
14: 98 percent / HCl / tetrahydrofuran; H2O / 16 h / 25 °C
With
1H-imidazole; hydrogenchloride; dmap; lithium aluminium tetrahydride; sodium azide; diphenylphosphoranyl azide; tetrabutyl ammonium fluoride; hydrogen; diisobutylaluminium hydride; triethylamine; orthoformic acid triethyl ester; benzoic acid;
palladium on activated charcoal;
In
tetrahydrofuran; dichloromethane; water; N,N-dimethyl-formamide; toluene;
DOI:10.1021/jo00362a030