Multi-step reaction with 7 steps
1: AgOTf / tetrahydrofuran / 0.25 h / 25 °C
2: Et3N / tetrahydrofuran / 12 h / Ambient temperature
3: NaBH4 / ethanol / 0.33 h / 45 °C
4: 95.5 percent / 30percent H2O2 / tetrahydrofuran / 0.33 h / Heating
5: 1.) HMPA, n-butyllithium; 2.) O2 / 1.) THF, -78 deg C, 7 min; 2.) THF, -78 deg C, 10 min, then --> room temp., 3 min
6: 1.) n-BuLi / 1.) THF, -98 deg C, 3 min; 2.) -98 deg C, 10 min, then --> room temp.
7: 95 percent / (dimethylamino)pyridine / CH2Cl2 / 0.42 h / Ambient temperature
With
N,N,N,N,N,N-hexamethylphosphoric triamide; dmap; sodium tetrahydroborate; n-butyllithium; dihydrogen peroxide; oxygen; silver trifluoromethanesulfonate; triethylamine;
In
tetrahydrofuran; ethanol; dichloromethane;
DOI:10.1021/ja00297a035