Multi-step reaction with 13 steps
1.1: 1.66 g / NEt3 / CH2Cl2 / 4 h / 20 °C
2.1: 94 percent / NaBH4 / ethanol; tetrahydrofuran / 0 - 20 °C
3.1: 90 percent / aq. NaOH / dioxane / 80 °C
4.1: PhI(OAc)2 / various solvent(s) / 0.5 h / 20 °C
5.1: 1.56 g / imidazole / dimethylformamide / 3 h / 20 °C
6.1: potassium hexamethyldisilazide / tetrahydrofuran / 8 h / -100 - 0 °C
6.2: BF3*Et2O; thiophenol / CH2Cl2 / 0 - 20 °C
6.3: 623 mg / Raney nickel / ethyl acetate; ethanol / 4 h / 20 °C
7.1: t-BuLi / tetrahydrofuran / 0.25 h / -78 °C
7.2: BF3*Et2O / tetrahydrofuran / 3 h / -78 - 0 °C
8.1: 381 g / Dess-Martin periodinane / CH2Cl2 / 2 h / 20 °C
9.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / dimethylformamide
9.2: 86 percent / CuCl; KOAc / dimethylformamide / 0.33 h / 20 °C
10.1: 95 percent / tetra-n-butylammonium fluoride / tetrahydrofuran / 5 h / 20 °C
11.1: 73 percent / NaBH(OAc)3; AcOH / CH2Cl2 / -78 - 20 °C
12.1: 95 percent / imidazole / dimethylformamide / 3 h / 20 °C
13.1: 97 percent / aq. NaOH; aq. H2O2 / tetrahydrofuran / 0.5 h / 0 °C
With
1H-imidazole; sodium hydroxide; sodium tetrahydroborate; [bis(acetoxy)iodo]benzene; tetrabutyl ammonium fluoride; dihydrogen peroxide; tert.-butyl lithium; potassium hexamethylsilazane; sodium tris(acetoxy)borohydride; Dess-Martin periodane; acetic acid; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine;
In
tetrahydrofuran; 1,4-dioxane; ethanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1002/anie.200460178