Multi-step reaction with 10 steps
1: 91.1 percent / diethyl ether / 25 °C
2: Celite, pyridinium chlorochromate (PCC) / CH2Cl2 / 3 h / 25 °C
3: p-toluenesulfonic aicd monohydrate, 2,2-dimethoxypropane / benzene / Heating
4: 60 percent / tetrahydrofuran; toluene / 1.) 0 deg C 1 h, 2.) 25 deg C, 3 h
5: 87.3 percent / 2N aq. HCl / tetrahydrofuran / 24 h / 25 °C
6: NaOMe / methanol / 48 h / Heating
7: 96 percent / NaBH4 / methanol / 0.25 h / 0 °C
8: 92.4 percent / pyridine / 120 h / 25 °C
9: 1.) O3, 2.) NaBH4 / 1.) MeOH, -78 deg C, 30 min, 2.) MeOH, 0 deg C, 1 h
10: 75 percent / hexamethylphosphoramide / 2 h / 70 - 80 °C
With
pyridine; hydrogenchloride; N,N,N,N,N,N-hexamethylphosphoric triamide; sodium tetrahydroborate; Celite; sodium methylate; toluene-4-sulfonic acid; ozone; 2,2-dimethoxy-propane; pyridinium chlorochromate;
In
tetrahydrofuran; methanol; diethyl ether; dichloromethane; toluene; benzene;
DOI:10.1021/jo00362a012